Our Mima Mounds Natural Area Preserve guide covers practical planning for Mima Mounds Natural Area Preserve Washington — best time to visit, getting there, and what to do on the ground.
Tucked away in the southwest corner of Thurston County, the Mima Mounds Natural Area Preserve Washington is a geological enigma that continues to captivate visitors and scientists alike. This unique landscape, a designated National Natural Landmark since 1966, features thousands of regularly spaced, dome-shaped mounds stretching across a vast prairie. We, the Roam States editorial team, have explored this fascinating site to bring you an independent and confident guide to planning your visit in 2026, ensuring you experience its mysterious allure without any generic fluff.
Why Visit Mima Mounds Natural Area Preserve
The primary draw to Mima Mounds Natural Area Preserve is, without a doubt, its namesake: the enigmatic Mima mounds themselves. These peculiar formations, varying from 3 to 7 feet tall and 8 to 40 feet wide, create an otherworldly landscape that sparks curiosity and debate. Scientists have pondered their origins for decades, with theories ranging from ancient pocket gophers to seismic activity, glacial deposits, or even massive floods. Walking among them, you'll find yourself pondering these very questions, making it a truly interactive natural puzzle.
Beyond the geological mystery, the preserve offers a vital glimpse into Washington's rare Puget prairie grasslands. This ecosystem, once expansive, now covers only a fraction of its original range. The Mima Mounds Natural Area Preserve protects 756 acres of this precious habitat, including Garry oak woodlands and savannahs, supporting a diverse array of prairie-dependent butterflies, birds, and native wildflowers.
It's a place where you can connect with nature, enjoy peaceful walks, and appreciate the ongoing conservation efforts by the Washington Department of Natural Resources to restore and maintain this unique environment.
Who It's Best For
The Mima Mounds Natural Area Preserve is an ideal destination for a wide range of travelers.
- **Nature Enthusiasts and Geologists:** Those with a keen interest in natural phenomena and geological mysteries will find the mounds endlessly fascinating. The interpretive signs and observation platforms provide ample information to delve into the various formation theories.
- **Hikers and Walkers:** With easy, well-maintained trails, including an ADA-accessible paved loop, it's perfect for casual strollers, families with young children, and individuals seeking a gentle outdoor experience.
- **Families:** The intriguing nature of the mounds sparks imagination in children, who often enjoy speculating on how they were formed. The flat, paved trails are stroller-friendly, and picnic areas offer a great spot for a family lunch.
- **Birdwatchers and Botanists:** The preserve's prairie ecosystem is a haven for various bird species and a spectacular display of wildflowers, particularly in spring. Keep an eye out for rare species like the golden paintbrush and diverse butterflies.
- **Photographers:** The unique landscape, especially during sunrise or sunset, provides incredible opportunities for landscape and nature photography. The vibrant wildflowers in spring add a splash of color to the rolling prairie.
If you're looking for a tranquil escape that offers both natural beauty and an intellectual puzzle, Mima Mounds Natural Area Preserve is an excellent choice.
Getting There & Parking
Navigating to Mima Mounds Natural Area Preserve is straightforward, whether you're coming from the north or south on Interstate 5. To get to Mima Mounds Natural Area Preserve, take Exit 95 (Littlerock/Maytown Road SW). Head west on Highway 121 (Maytown Road SW) towards Littlerock. Continue straight through Littlerock, past the school and mini-mart, onto 128th Avenue. Travel approximately 0.8 miles until 128th Avenue ends at a 'T' intersection. Turn right onto Waddell Creek Road and drive about 1 mile. The entrance to Mima Mounds Natural Area Preserve will be on your left.
Parking at Mima Mounds Natural Area Preserve
Parking at the preserve requires a Washington State Discover Pass. This pass helps fund the management of Washington's state lands. You can purchase a daily pass for $10 or an annual pass for $30. It's important to note that there is no pay station at the park, so we recommend purchasing your Discover Pass online in advance or at a participating vendor. There are several small parking areas available, with the main entrance off Waddell Creek Road leading to parking within the forested area. The second parking area also has restrooms. For those just wanting a quick peek, a couple of 15-minute parking spots are available at both parking areas that do not require a fee. The roads leading to the preserve are paved and accessible to low-clearance vehicles.
Remember that dogs are not allowed on the trails, with the exception of service animals, to help preserve the delicate ecosystem. There is a bike rack by the paved trailhead if you arrive by bicycle.
Top Things to Do
The Mima Mounds Natural Area Preserve offers a range of activities centered around its unique landscape and ecological significance. Here are the top things to do at Mima Mounds Natural Area Preserve:
- **Hike the Interpretive Trails:** The preserve boasts an excellent trail system. Start with the 0.5-mile paved, ADA-accessible loop, which leads to an interpretive shelter and observation deck. This loop is perfect for all abilities and provides a great overview of the mounds and the prairie ecosystem.
- **Explore the Gravel Loops:** For a longer experience, branch off onto the two gravel paths. The North Loop is another 0.5-mile trail, while the South Loop offers a 1.5-mile to 2-mile journey, allowing you to wander among the mounds and potentially catch glimpses of Mount Rainier and Mount St. Helens on clear days. In total, there are about 2.75 miles of trails to explore. These trails are excellent for getting up close and personal with the Mima mounds.
- **Visit the Observation Deck:** At the interpretive center, a multi-level observation deck provides panoramic views of the sprawling prairie and its mysterious mounds. It's an excellent spot for photographers and offers a different perspective on the landscape. A ramp is available at the midpoint of the paved loop for accessibility.
- **Learn About the Mystery:** The interpretive center features full-color signs detailing the various hypotheses about the mounds' formation, prairie ecology, the role of fire, and Native American land use. We highly recommend reading these exhibits before or during your walk to enrich your understanding of this natural wonder.
- **Wildlife and Wildflower Spotting:** The preserve is a critical habitat for prairie-dependent butterflies and birds. Visit in spring (April and May) to witness a spectacular display of native wildflowers, including blue camas lilies, which carpet the prairie in vibrant hues. Keep an eye out for deer and other small creatures.
- **Enjoy a Picnic:** Picnic tables are available in shaded areas near the parking lot, some even nestled on top of small mounds. It's a perfect spot to relax and refuel after exploring the trails.
When enjoying these things to do at Mima Mounds Natural Area Preserve, remember to stay on marked trails to protect the delicate prairie ecosystem and pack out everything you pack in.
Best Time to Visit
While Mima Mounds Natural Area Preserve is open year-round, certain seasons offer distinct advantages for visitors.
- **Spring (April and May):** This is widely considered the best time to visit. The prairie bursts into a riot of color with blooming wildflowers, including native blue camas, buttercups, and blue violets. The weather is typically mild and pleasant for hiking, and the vibrant blooms attract numerous butterflies, making it ideal for photography and nature observation.
- **Summer (June to September):** The preserve remains open and accessible, offering long daylight hours. While the wildflowers may have faded, the prairie grasses are lush, and the warmth is inviting for leisurely walks. Be prepared for direct sun exposure, as there is little shade on the prairie itself. Pack sunscreen, a hat, and plenty of water.
- **Fall (October and November):** As temperatures cool, the prairie grasses take on golden and brown hues, offering a different kind of beauty. It's a quieter time to visit, and the crisp air can be invigorating for a walk. The preserve is open from 7 AM to dusk daily.
- **Winter (December to March):** While generally snow-free, the colder months offer a stark, serene beauty. The mounds are still visible, and you might experience a peaceful solitude on the trails. Dress warmly and check local weather conditions before heading out. The preserve is open from 7 AM to dusk daily.
Regardless of the season, we recommend visiting during mid-morning or mid-afternoon for the best light and wildlife viewing opportunities. Be aware that the preserve is located next to a shooting range, and gunshots may be heard, though wildlife appears accustomed to it.
Where to Stay Nearby
When planning your trip to Mima Mounds Natural Area Preserve, finding comfortable and convenient lodging is key. While there are no accommodations directly at the preserve, several excellent options are available in nearby towns, primarily Olympia and Centralia.
Mima Mounds Natural Area Preserve Lodging in Olympia
Olympia, the state capital, is roughly 20 minutes north of Mima Mounds and offers a wider array of hotels, dining, and other attractions. This makes it an ideal base for exploring both the preserve and the city. Here are some of our top recommendations for Mima Mounds Natural Area Preserve lodging in Olympia:
- **TownePlace Suites by Marriott Olympia:** This hotel offers spacious rooms, kitchenettes, and free bikes, making it a comfortable option for families or longer stays. It's well-regarded for its cleanliness and friendly staff.
- **Hampton Inn & Suites Olympia Lacey, WA:** Known for its reliable quality and amenities, including complimentary breakfast and an indoor pool, the Hampton Inn & Suites is a solid choice for a comfortable stay.
- **Hilton Garden Inn Olympia, WA:** Offering modern amenities, a restaurant, and a convenient location, the Hilton Garden Inn provides a comfortable and upscale experience.
- **Courtyard by Marriott Olympia:** Another excellent Marriott property, the Courtyard offers comfortable rooms and a bistro-style restaurant.
- **Ramada by Wyndham Olympia:** A more budget-friendly option, the Ramada provides clean rooms, free Wi-Fi, and a complimentary daily breakfast.
Many hotels in Olympia also offer free parking, which is a significant plus for travelers.
Lodging Near Centralia/Grand Mound
South of Mima Mounds, the areas around Centralia and Grand Mound also provide lodging options, particularly if you're traveling from the south or planning to visit other attractions in that direction, such as Great Wolf Lodge Grand Mound. Mima Mounds Natural Area Preserve is about 12.3 miles (19.7 km) from central Olympia, but the Great Wolf Lodge area is closer to Centralia.
- **Fairfield Inn & Suites by Marriott Grand Mound Centralia:** Located near Great Wolf Lodge, this hotel offers a comfortable stay with good amenities.
- **Great Wolf Lodge Grand Mound:** If you're traveling with kids and looking for a resort experience with an indoor water park, this is a popular choice, though it's a bit further from the preserve.
- **La Quinta Inn & Suites by Wyndham Centralia:** A well-rated option in Centralia, offering comfortable rooms and complimentary breakfast.
When selecting your Mima Mounds Natural Area Preserve lodging, consider your itinerary and whether you prefer the amenities of a larger city like Olympia or a more direct route from other regional attractions.
Sample 2-Day Itinerary
To fully appreciate the Mima Mounds Natural Area Preserve and the surrounding area, we recommend a two-day itinerary. This allows for a thorough exploration of the preserve and time to discover the charm of Olympia and its nearby natural wonders. For more Washington travel inspiration, check out our guide to the Best places in Washington.
Day 1: Mima Mounds & Local Nature
- **Morning (9:00 AM - 1:00 PM): Explore Mima Mounds Natural Area Preserve.**
- Arrive early to enjoy the tranquility and best light for photography. Purchase your Discover Pass in advance.
- Start with the 0.5-mile paved, ADA-accessible interpretive loop, taking time to read all the informational signs about the mounds' mysterious origins and the prairie ecosystem.
- Ascend to the observation deck for panoramic views.
- Continue onto the longer gravel loops (North and South) to immerse yourself fully in the landscape. Keep an eye out for wildflowers (especially in spring) and prairie birds.
- Enjoy a picnic lunch at one of the shaded tables near the parking area.
- **Afternoon (2:00 PM - 5:00 PM): Mima Falls Trail or Billy Frank Jr. Nisqually National Wildlife Refuge.**
- **Option A (Hiking):** Head to the nearby Mima Falls Trailhead in Capitol State Forest for a more vigorous hike. This trail system is open to hikers, bikers, and horseback riders, leading to a 25-foot waterfall.
- **Option B (Wildlife):** Drive north to the Billy Frank Jr. Nisqually National Wildlife Refuge. This vast habitat of protected marshes, grasslands, and forests is excellent for birdwatching and features a long boardwalk over the estuary.
- **Evening: Dinner in Olympia.**
- Head into Olympia for dinner. Explore the diverse culinary scene, from casual eateries to upscale restaurants.
- Check into your chosen Olympia accommodation.
Day 2: Olympia Exploration & Iconic Washington Sights
- **Morning (9:00 AM - 12:00 PM): Discover Downtown Olympia.**
- Start with a visit to the Washington State Capitol Building for a free guided tour, admiring its impressive dome and architecture.
- Stroll along Percival Landing, a scenic boardwalk with views of Budd Inlet and the Olympic Mountains.
- If it's a market day (Thursday-Sunday, April-October), explore the Olympia Farmers Market, the second-largest in Washington.
- **Lunch (12:00 PM - 1:00 PM): Olympia.**
- Grab lunch at one of Olympia's many local cafes or restaurants.
- **Afternoon (1:00 PM - 5:00 PM): Tumwater Falls Park & Beyond.**
- Visit Brewery Park at Tumwater Falls, a beautiful park with cascading waterfalls and easy trails along the Deschutes River. Look for salmon in the fish ladder during September and October.
- Consider a visit to the Hands On Children's Museum if traveling with kids, or the Olympic Flight Museum for aviation enthusiasts.
- For those interested in more iconic Washington destinations, Olympia serves as a good jumping-off point for day trips to Mount Rainier National Park (approx. 1 hour drive) or Olympic National Park (approx. 45 minutes to the eastern edge).
- **Evening: Relax or Depart.**
- Enjoy a final dinner in Olympia or begin your journey home, perhaps planning your next adventure using our Plan Your US Trip guide.
This itinerary balances the unique natural beauty of Mima Mounds with the cultural and recreational offerings of Olympia, providing a comprehensive and memorable Washington experience. Don't forget to explore other Washington gems like Pike Place Market in Seattle for a completely different vibe.
Is It Worth Visiting?
From our perspective as independent US travel authorities, we confidently say that Mima Mounds Natural Area Preserve is absolutely worth visiting. While it may not have the towering peaks of Mount Rainier or the dramatic coastline of Olympic National Park, its unique geological formations offer a distinct and captivating experience that stands out among Washington's natural attractions. The mysterious, regularly spaced mounds are a natural puzzle that engages the mind as much as the trails engage the body.
What makes Mima Mounds Natural Area Preserve particularly compelling is its accessibility and the sheer wonder it inspires. The paved, ADA-accessible trails ensure that almost everyone can experience this natural phenomenon firsthand, making it an inclusive destination for families with strollers, individuals using wheelchairs, and those seeking an easy, gentle walk in nature. The interpretive center provides valuable context, allowing visitors to delve into the scientific debates surrounding the mounds' formation, transforming a simple walk into an educational journey.
Moreover, the preserve's role in protecting a rare Puget prairie grassland ecosystem adds to its significance. Visiting Mima Mounds Natural Area Preserve offers an opportunity to witness critical conservation efforts and appreciate the delicate balance of nature. The vibrant wildflower displays in spring and the abundant birdlife further enhance the experience, providing a beautiful backdrop to the geological oddity.
While some visitors note the occasional noise from a nearby shooting range, we find that the overall tranquility and unique beauty of the Mima Mounds largely outweigh this minor distraction. It's a place that leaves a lasting impression, prompting reflection on the Earth's natural processes and the enduring mysteries of our planet. For a truly unique natural experience in Washington, we believe Mima Mounds Natural Area Preserve is worth visiting and highly recommend adding it to your itinerary.
FAQ
Mima Mounds Natural Area Preserve with kids
Mima Mounds Natural Area Preserve is an excellent destination for families with kids. The 0.5-mile paved, ADA-accessible loop trail is perfect for strollers and young children, making it easy for everyone to explore. Kids will love the mystery of the mounds and can engage with the interpretive signs that present various theories about their formation, sparking their imagination. There are also picnic tables for a family lunch, and the open prairie provides space for children to observe birds and wildflowers. Remember that dogs are not permitted, except for service animals.
best hotels near Mima Mounds Natural Area Preserve
The best hotels near Mima Mounds Natural Area Preserve are primarily found in Olympia, about a 20-minute drive north. Top choices include TownePlace Suites by Marriott Olympia, Hampton Inn & Suites Olympia Lacey, WA, Hilton Garden Inn Olympia, WA, and Courtyard by Marriott Olympia. These hotels offer a range of amenities, including free parking and often complimentary breakfast, providing a comfortable base for your visit. For those traveling from the south or looking for a resort experience, hotels near Grand Mound/Centralia, such as Fairfield Inn & Suites by Marriott Grand Mound Centralia or Great Wolf Lodge Grand Mound, are also options.
Mima Mounds Natural Area Preserve tips
To make the most of your visit to Mima Mounds Natural Area Preserve, we recommend a few key tips: Purchase a Washington State Discover Pass online in advance, as it's required for parking and there's no on-site pay station. Visit in spring (April-May) for the most spectacular wildflower displays. Wear layers and bring sun protection (hat, sunscreen) as the prairie offers little shade. Read the interpretive signs to fully appreciate the geological mystery. Stay on marked trails to protect the delicate ecosystem. Bring water and snacks, and remember to pack out all trash. Note that dogs are not allowed, with the exception of service animals.
where to stay near Mima Mounds Natural Area Preserve
For convenience and a wider selection of amenities, we recommend staying in Olympia when visiting Mima Mounds Natural Area Preserve. It's approximately a 20-minute drive and offers numerous hotels, restaurants, and attractions. Options range from extended-stay suites like TownePlace Suites by Marriott Olympia to well-known brands like Hampton Inn & Suites and Hilton Garden Inn. Alternatively, if you're coming from the south, the Centralia/Grand Mound area also provides hotels, including those near Great Wolf Lodge.
Mima Mounds Natural Area Preserve parking
Parking at Mima Mounds Natural Area Preserve requires a Washington State Discover Pass, which costs $10 for a day or $30 for an annual pass. There are two small parking lots available, and it's essential to purchase your pass beforehand as there are no facilities to do so on-site. The main parking area is located off Waddell Creek Road within a forested section, and a second parking area includes restrooms. A few 15-minute parking spots are available free of charge for quick views. The access roads are paved and suitable for all vehicle types.
best time to visit Mima Mounds Natural Area Preserve
The best time to visit Mima Mounds Natural Area Preserve is during the spring, specifically April and May. This period offers the most vibrant display of native wildflowers, including blue camas, which cover the prairie in beautiful colors. The weather is typically mild and pleasant for hiking. While the preserve is open year-round from 7 AM to dusk daily, the spring bloom provides an unparalleled visual experience and attracts various butterflies, enhancing the natural beauty of the mysterious mounds.
We hope this comprehensive guide inspires you to explore the unique and captivating Mima Mounds Natural Area Preserve. Its blend of geological mystery, ecological importance, and accessible trails makes it a truly special destination in Washington State. Happy travels!
Last updated: 2026-07-08 by the Roam States team.