King County, Washington
5,027 hiking & walking trails · 24parks, recreation areas & campgrounds · 42 cities. Real OpenStreetMap + Recreation.gov data, with a free trail map for every listing.
About Hiking in King County, Washington
King County is home to 5,027 mapped hiking trails and 24 federal parks, campgrounds, and recreation areas spread across 42 cities. Trail data is sourced from OpenStreetMap contributors; park and campground info comes from Recreation.gov.
Looking for something specific? Search all trails in King County or browse parks. Want to narrow further? Pick a city below to see only that city’s outdoor options.
Trails & Parks in King County
Up to 224 pinpoints showing trail and park locations across the county.
Cities in King County
Click any city to see trails and parks within it.
18 more cities in this county.
Sample Parks in King County
Sample Trails in King County
Curated Guides for King County
Frequently Asked Questions
Are there hiking trails in King County, Washington?
Yes — we have 5,027 mapped hiking and walking trails in King County, Washington, sourced from OpenStreetMap. Browse the full list below, with distance, elevation, and difficulty for each.
What is the most difficult hiking trail in King County, Washington?
A.T.M. near Black Diamond is rated hard — the toughest classification among King County, Washington's mapped trails.
What is the best hiking trail in King County, Washington for families?
10 Acre Woods Trail near Woodinville is one of the best family picks in King County, Washington — easy difficulty, short enough for kids and first-timers. See the full family hiking guide below for more options.
Is there a trail map for King County, Washington?
Each of the 5,027 trails in King County, Washington has its own page with an interactive map, GPS coordinates, and a link to view it on OpenStreetMap — no app or account needed.
What parks and recreation areas are in King County, Washington?
King County, Washington has 24 parks, recreation areas, and federal facilities in our index (3 classified as recreation areas). Each listing includes activities, photos where available, and directions.
Can I go camping in King County, Washington?
Yes — 2 of King County, Washington's parks have mapped campsites, from first-come sites to Recreation.gov reservations. The largest is Tinkham Campground with 52 sites. See the full campgrounds guide below for the ranked list.
Where can I find hiking trails and parks near King County, Washington?
Browse all hiking trails, walking trails, parks, and campgrounds across Washington for more options beyond King County, Washington.
Hiking guides for Washington
Statewide rankings and guides — useful context for King County.
Photo: Sergei AkulichThe 10 Longest Hiking Trails in Washington, Ranked
Washington's longest mapped hiking trails, ranked by distance with notes on what makes each route worth the commitment.
Photo: Holly MandarichWashington's 10 Most Punishing Trails by Elevation Gain
Steep is hard. These are the ten Washington trails with the most total elevation gain — quad-burners earned by hard climbing.
Photo: Maddi BazzoccoThe Best Beginner-Friendly Hikes in Washington
Ten gentle, well-marked Washington trails perfect for first-time hikers, families, or recovery days.
Photo: Tobias MrzykThe 10 Most Challenging Hikes in Washington
Washington's ten hardest hikes — expert difficulty, big mileage, or serious exposure. Reserved for experienced hikers.
Photo: Diego LozanoThe Best National Parks & Recreation Areas in Washington
Federal parks and recreation areas in Washington ranked by what they actually offer hikers and campers, not just popularity.
Photo: Tobias MrzykBest Waterfall Hikes in Washington: 10 Trails to See Falls Up Close
Washington's best hikes to named waterfalls — from short family-friendly viewpoints to all-day cascade chasing.