USARunningRoadMarathon · 42.2 km / 26.2 miOther

Boulderthon Marathon

Boulder, CO, CO (USA) · USA

No future date listed

About Boulderthon Marathon

Boulderthon Marathon is a running event in Boulder, CO, CO (USA), United States. Recorded disciplines include Marathon. The listed surface is road. No future date is currently listed on ATHRECS. The ATHRECS archive includes editions from 2025. This describes the editions recorded here, not the event's founding date or complete history.

Athlete profiles

Explore some of the athletes with recorded results at Boulderthon Marathon.

Dates, starts & entry

Times are local to the race. Select the entry route for your distance.

The next date has not been announced here. Check the race website for updates.

Location & race day

Listed venue / area

Boulder, CO (USA), COUSA

Find this location on a map

Confirm the exact start line, parking and arrival instructions with the organiser. A listed town or postcode may cover a wider area.

About the race

Road Running. Listed on the World Athletics calendar.

Surface:: Road

Results

Public-figure or athlete-approved ATHRECS results, plus verified organiser links.

1 edition

Sun, 28 Sept 2025

Marathon · 42.2 km / 26.2 mi

Results · worldathletics.org

Past races

Marathon · 42.2 km / 26.2 miFinishedResults

Sun, 28 Sept 2025

Distance and date supplied by World Athletics result programme; source meeting 7231772

OtherFinished

Sun, 28 Sept 2025

World Athletics competition 7231772; Road Running; source date range 2025-09-28 to 2025-09-28. Exact discipline distances are added only from result or programme evidence.