Boulderthon Marathon
- When
- Sun, Sep 27, 2026, 12:00 AM
- Where
- Boulder, US
- Distances
- 5K · 10K · Half Marathon · Marathon
- Terrain
- ROAD
- Price
- 31.03–350 USD
- Elevation gain
- 185 m
- Typical weather
- Mild
- Organizer
- Stronger Faster Boulder Co.
About
Boulder hosts the Heart To Heart 5K Presented by BCH on 27 September 2026, with Stronger Faster Boulder Co. organizing the event in partnership with Boulder Community Health and using a downtown start at 21st and Pearl before finishing at 15th and Pearl. The race is run on an all-road, fast and flat course in downtown Boulder and has 80 feet of elevation gain.