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Mill Creek Nature Preserve: Trails, Wildlife, and Green Space in the City


By Becca Locke

Mill Creek surprises many newcomers with how much green space sits inside a planned community. Between creeks, wetlands, and miles of paved paths, a short walk can feel far from the road. One preserve in particular draws attention from neighbors who want quiet time outdoors.

I put together what I know about it, along with other nearby places to explore.

Key Takeaways

  • Community-managed preserve: The Mill Creek Community Association maintains a preserve of roughly 120 acres.
  • Linked pathways: The association describes more than sixteen miles of paved trails that connect its neighborhoods.
  • Creek habitat: The City of Mill Creek notes that Penny Creek flows through a nature preserve within the city.
  • Public options: North Creek Park and the North Creek Trail welcome all visitors.

The Preserve Managed by the Mill Creek Community Association

The preserve is maintained by the Mill Creek Community Association, which describes it as about 120 acres with a fish ladder and a dam. It sits within a community that also owns 21 pocket parks and 12 play areas.

What the Association Shares

  • Acreage: The association lists the preserve at about 120 acres or more.
  • Fish ladder: A fish ladder and dam are part of the property.
  • Trail network: The association says its paths total more than sixteen miles of concrete and asphalt trail.
Because the preserve belongs to the association, access rules can differ from those of a city park. Contact the association before planning a visit so you know who may enter.

Leash Rules and Wildlife Etiquette

Pets must be leashed at all times in association common areas under the covenants and city code. The same rules prohibit feeding wildlife in those areas, which helps animals stay wild.

Habits That Protect the Habitat

  • Leashed pets: Keep dogs on a leash so wildlife and other walkers are undisturbed.
  • No feeding: The association bans feeding wildlife in its common areas.
  • Quiet visits: A calm pace helps visitors notice birds and other wildlife along the creek.
These simple habits keep the green space pleasant for everyone who shares it. The association posts its common-area rules on its website.

Penny Creek and the City’s Nature Preserve

The City of Mill Creek notes a nature preserve that Penny Creek flows through. Creekside corridors like this give the city a wild edge in the middle of a planned community.

Water at the Center of the Landscape

  • Penny Creek: The creek is one of two named streams that run through the city.
  • North Creek: The North Creek Greenway forms a separate corridor of protected green space.
  • Fish passage: A fish ladder at the association preserve shows that the creek is managed with fish in mind.
Water shapes the character of Mill Creek more than many visitors expect. A walk along either creek corridor is an easy way to see it.

North Creek Park and Its Floating Boardwalk

Snohomish County’s North Creek Park at 1011 183rd St SE is open from 7 a.m. to dusk. Its interpretive floating boardwalk runs about three-quarters of a mile across the wetland.

A Public Wetland Walk

  • Trail length: The Washington Trails Association lists about 1.8 miles of trails with minimal elevation gain.
  • Dogs and parking: Leashed dogs are allowed, and the parking lot is free.
  • Bird sightings: Hawks, eagles, ducks, geese, hummingbirds, wrens, and woodpeckers are reported there.
The boardwalk has pinch points, and it may not suit wheelchairs when flooded. Check the county website for current conditions before you go.

North Creek Trail and City Parks

The North Creek Trail follows the North Creek Greenway from McCollum Park south to the city limits. It is open from sunrise to sunset and includes a nature trail, a bike path, benches, and picnic tables.

More Places to Wander

  • City parks: Cougar, Heron, Highlands, Library, and Nickel Creek parks all have nature trails and are open from 8 a.m. to 10 p.m.
  • Sports Park: Mill Creek Sports Park at 13903 North Creek Dr. adds athletic fields and a skate park.
  • Citywide trails: The city reports more than 23 miles of trails in all.
Between the creek corridors and the city parks, there is a route for almost every pace. I am happy to share favorite loops with clients who are exploring neighborhoods.

FAQs

Can anyone walk the Mill Creek Nature Preserve trails?

The preserve is maintained by the Mill Creek Community Association, and official pages do not state whether the public may enter. Contact the association before visiting, and consider North Creek Park for a fully public option.

Are dogs allowed on Mill Creek trails?

Dogs must be leashed in association common areas and are allowed on leash at North Creek Park. Check the posted rules at each park before you go, and carry waste bags for the walk.

Which trail is best for birdwatching?

North Creek Park’s boardwalk is a good starting point, with hawks, eagles, ducks, and woodpeckers reported there. Visit early in the day for the best chance of sightings and a quieter walk.

Reach Out to Becca Locke

Reach out to Becca Locke to find a Mill Creek home near the creeks and trails that fit your routine.



Work With Becca

Whether you're buying your first home, selling the one you've outgrown, or relocating to the Snohomish County area, you deserve an advisor who knows this market from the inside out. I've lived in Mill Creek for 13 years, sold 500+ homes across the greater Puget Sound region, and built a practice around one thing: making sure my clients make confident, informed decisions. Whether you're a first-time buyer navigating a competitive Snohomish County market, a homeowner ready to sell and move on, or relocating to the Pacific Northwest and trying to figure out where to land, I bring the same thing to every situation: deep local knowledge, honest guidance, and a process that keeps you informed from start to finish.

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