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Trail Running Calendar near Brighton 2026-2027

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Explore the top trail runs near Brighton for 2026-2027! We've gathered 14 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.

August 2026
Aug
15
Sa

Boulder Rez Marathon

Trail Run 10 km Half Marathon 32 km Marathon
A mostly dirt and trail race along Boulder Reservoir in Boulder, Colorado, with about 200 feet of elevation gain. Distances range from a 10K to a full marathon, plus a relay option.
Aug
15
Sa

Roxborough Ultras

Trail Run 31 mi 50 mi
Two fully supported trail ultras in Roxborough State Park with technical singletrack, significant elevation gain, and a finish at the Sharptail Trailhead.
Aug
15
Sa

Westminster Night Trail

Trail Run 6 km 12 km ... 36 km 50 km
Westminster Trail Races on August 15 2026 offers multiple trail distances around Standley Lake on packed dirt with lake and mountain views.
Aug
29
Sa

RexRun For PAWSitivity Trail Run/Walk

Trail Run Walk 5 km
A community trail event at the Arapahoe County Fairgrounds on 08/29/2026 with a 5K run, a family 5K walk that allows leashed dogs, and a kids 1 mile plus demonstrations, vendors, and a pancake breakfast.
September 2026
Sep
5
Sa

Demon Dash

Trail Run 5 km
Join the community for a 5K run or walk on a brand new dirt course at the North Arvada Middle School Athletic Complex. Support local high school racers before taking on this off road route yourself.
Sep
11-12
Fr - Sa

American Heroes Run

Trail Run Walk 5 km 9 mi ... 551 min 100 mi
Multi distance endurance event in Longmont, Colorado on September 11 12 2026, held on a flat 1.05 mile loop with in person and virtual options.
Sep
19
Sa

Break of Dawn North Table Trail Race

Trail Run 5 mi 10 mi
Trail race fundraiser at North Table Mountain in Golden CO on Sept 19 2026 featuring a 10Mi North Table Loop and a 5Mi Breaking Dawn Fiver.
Sep
20
Su

Expo Park XC Run

Trail Run 3 km 4 km 5 km
A day of youth and adult cross country races in Aurora, Colorado on September 20, 2026, featuring grass courses with small undulations, a creek crossing, and bale jumps; distances run from 2k youth races up to a 5k open race.
October 2026
Oct
3
Sa

HRCA Wildcat Mountain Trail Race

Trail Run 2 mi 10 km 10 mi
Experience the scenic HRCA Backcountry Wilderness Area with trail races for the whole family. Enjoy rolling hills and open views followed by a pancake breakfast and finisher medals for all participants in Littleton.
Oct
17
Sa

The Great Trailhead Foot Race 10 Miler

Trail Run 5 mi 10 mi
Trail races at Bear Creek Lake Park offering 5 miles or a two-lap 10 miles on single-track dirt. Registration includes park admission, a finisher meal and refreshments; 10 mile finishers receive a commemorative mug.
Oct
25
Su

Monsterdash - Louisville

Trail Run 5 km 10 km Half Marathon
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.
Oct
31
Sa

Eerie Erie

Road Race Trail Run Walk 5 km 10 km
A Halloween themed 5k and 10k through historic downtown Erie and Coal Creek trails, with a kids Goblin Run and BOLDERBoulder qualifier status. The event supports the Erie Optimist Club as its primary fundraiser.
November 2026
Nov
14
Sa

Louisville Trail Race

Trail Run 5 km 10 km 13 mi
Trail races in Louisville Colorado offering a half marathon, 10K and 5K on dirt trails with views of the Flat Irons and on course aid stations.
December 2026
Dec
12
Sa

Santa Claus Run

Trail Run Walk 5 km 10 km Half Marathon
Santa Claus Run in Louisville, Colorado on December 12, 2026 features a new half marathon plus 5k, 10k and kids races. The event includes an on-site expo, participant neck buffs, a finisher snow globe, food and a visit from Santa.
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