2026 Boulderthon Boulder Marathon

Name: 2026 Boulderthon Boulder Marathon
Start: 2026-09-27
End: 2026-09-27
Location: Boulder, United States

42KCombo

Distances5K10K21K

BonusesScenic

Sep 27, 2026 · 1 day🇺🇸 Boulder, United States

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Key Facts

Standouts

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A high-altitude scenic tour rather than a flat time-trial, starting and finishing on the historic Pearl Street Mall in downtown Boulder, with open Rocky Mountain views beneath the Flatirons foothills. The course is USATF-sanctioned and Boston-qualifying, with a 6-hour time limit.

Why attend here

Boulder in late September offers crisp, golden light on the Flatirons and quiet back roads, perfect for a high-altitude tour without summer crowds. After the finish on Pearl Street Mall, warm up with a farm-to-table meal and a local craft beer, then stroll the brick-lined streets as the aspens begin to turn.

Distance from you

From Columbus, US to Boulder, US

~2.4h · 1,892 km

Boulder

combo

forecast

27 Sun

29°14°

13%5.3 m/s

ComboPart of 2 combo trips

American Academy of Clinical Toxicology Annual Scientific Meeting + 5 RacesSep 27 – Oct 4San Francisco, California +5 sports Mayo Clinic Stimulation Therapies for Epilepsy 2026 + Hyrox & 6 RacesSep 18 – Sep 27Rochester +6 sports

Event Details

Elevation

184m

Course

A high-altitude scenic tour rather than a flat time-trial. Runners head out onto the quiet back roads of Boulder beneath the Flatirons foothills, with open mountain views, before winding back into downtown for a finish on the historic, brick-paved Pearl Street Mall.