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Trail Running Calendar near Renton 2026-2027

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Explore the top trail runs near Renton for 2026-2027! We've gathered 59 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.

June 2027
Trail races at Cougar Mountain Regional Wildland Park near Seattle with 5 km, 8.2 miles, and 14.5 miles through forest, single-track, hills, and marsh.
Forest trail races at Carkeek Park in Seattle with 5k and 10k routes, varied terrain, an aid station at the meadow, post race food, and awards.
A 24-hour choose-your-own-adventure trail event at Camp Sheppard with six routes, optional side quests for bonus points, and live leaderboard for solo or three-person teams.
July 2027
Evening trail loop through Seward Park's old growth forest with 4.2 mile and 10k options, aid station, post-run food, awards, and on-course snacks.
Multiple trail races in Cougar Mountain Regional Wildland Park near Seattle, offering 5k, 10.8 mile and 19.5 mile courses as part of a series supporting King County Parks.
A July 20, 2027 trail run at St. Edward State Park offering 4 mile and 8 mile loop options on twisting single track with aid station, post-run food, and awards.
Three sequential 5K trail races in Puyallup with 45 minutes per 5K and 30 minutes to transfer, limited to 100 entrants; chip timing, shirt, medal, and RaceJoy required.
A family friendly 5K mud run at Motowest MX Motocross Track with obstacles, waist deep mud pits, pre race entertainment, and standard and VIP registration options.
August 2027
5k, 14.5 mile and 26.2 mile trail races at Cougar Mountain Regional Wildland Park near Seattle, part of an annual series supporting King County Parks.
Timed 18, 12, 6 and 3 hour loop races plus a Kids Loopy 30 Minute at Lincoln Park in Seattle, featuring waterfront and forest sections and on course aid stations.
A 24 hour event in Bonney Lake with a 5K every hour; participants may run between one and 24 laps and receive a medal and shirt showing how many 5Ks they completed.
USATF certified half marathon on the Snoqualmie Valley Trail near North Bend, WA, on smooth hard packed dirt and gravel with aid stations, pacers and a virtual option.
September 2027
A late summer community running event at Magnuson Park in Seattle offering 5k, 10k, 15k, a Kids Dash and an Obstacle Dash.
A multi day ultrafestival on Labor Day weekend in Bonney Lake with looped 3.1 mile (5K) laps, multiple distances, free camping and a central Race HQ.
October 2027
A community-run Half Marathon and 5K in Maple Valley on October 2, 2027, featuring a mostly gravel, scenic course, chip timing, and medals for finishers.
A Last One Standing backyard ultra on October 2, 2027 where $100 is added each hour to a prize jar, split 75/25 between winner and runner-up.
A two-day trail running festival in North Bend with steep mountain races including a 30K skyline, a VK uphill, community events and a $4,500 prize purse.
A backyard ultra in downtown Tacoma with a 3.33-mile loop repeated every hour for up to 15 hours, passing the Bridge of Glass and the Tacoma Dome.
Costumed 5K trail run and kids dashes at Lincoln Park supporting South Seattle College Cooperative Preschools, with shirts and bibs included for registrants.
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