Nederland
Trail Running Calendar near Nederland 2026-2027
Explore the top trail runs near Nederland for 2026-2027! We've gathered 28 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
October 2026
A trail race weekend in Lakewood CO offering distances from 5K to 100K on mostly singletrack dirt trails with aid stations, drop bags, and looped course formats.
A scenic 5K through Estes Park during Elk Fest with shuttle transport from the Visitor Center and a finish at Performance Park.
Trail races in Louisville, CO paired with an Oktoberfest finish, wooden medals, a free pretzel and live Bavarian music.
A mountain backyard ultra where runners complete a 4.167 mile loop every hour at about 8,000 feet until one person remains; $1,000 for the last runner and buckles at 100 miles.
Run the Rocks is a fundraiser at Red Rocks Park and Amphitheatre on October 11, 2026 offering a 5k and a 1.3 mile run and walk to support lung health in Colorado.
A traditional Backyard Ultra at Luvin Arms Animal Sanctuary on October 24-25, 2026 with hourly 4.167 mile loops, on-site aid, camping, and proceeds supporting the sanctuary.
An approximately 18 mile trail across Boulder's five peaks with about 5,000 ft of climbing on October 24, 2026; limited to 100 participants with a $25 fee donated to recovery.
MonsterDASH Louisville on Oct 25, 2026 offers a new half marathon plus 5k, 10k and a kids mile with costume contests, expo, and themed runner perks.
Backyard ultra at Bear Creek Lake Park where runners repeat a 4.16-mile loop each hour until one remains or the field is stopped at the 11th hour.
November 2026
Trail races on November 14, 2026 in Louisville CO offering Half Marathon, 10K and 5K on dirt out and back courses with aid stations and post-race festivities.
A self-supported 50K in Golden, Colorado visiting four local peaks with Parfet Park as the central hub and minimal course markings.
December 2026
A mountain challenge in Estes Park where runners complete 2km laps with 540ft of gain to reach elevation milestones and collect poker chips for rank.
Holiday trail runs in Louisville CO with 5k, 10k, a new half marathon, expo pickup, giveaways, family activities, and a visit from Santa.
Celebrate the season with a festive 10K featuring 1,500 feet of climbing and beautiful trail views at the YMCA of the Rockies.
February 2027