Helen H. Richardson, The Denver PostRunner Luke Novack stretches before taking part in the marathon in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
A runner enjoys the sunrise at Boulder Reservoir as they try to stay warm before taking part in the inaugural Boulderthon on Oct. 10, 2021, in Boulder. (Helen H. Richardson, The Denver Post)
Helen H. Richardson, The Denver PostRunners watch the sunrise at Boulder Reservoir before a race on Oct. 10, 2021.
Helen H. Richardson, The Denver PostRunner Katie O'Brien stretches before the start of the marathon in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostRunner Keith Sherrill lays on the grass to relax before taking part in the inaugural Boulderthon on Oct. 10, 2021, in Boulder. Sherrill, who was running in the marathon, came from Sackets Harbor, New York to run in the race.
Helen H. Richardson, The Denver PostRunners take off from the start of the half marathon in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostRunner Andrew Borjon, of Broomfield, adjusts his racing bib before the start of the marathon in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostAn ultralight paramotor flies past runners taking part in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostBryon Malang puts his hand on his heart during the singing of the National Anthem as he stretches before the start of the half marathon during the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostRunners take off from the start of the marathon in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostCatilin McGinn, left, her mother Linda McGinn, center, and her husband Zach Bennett, brought their dog Ruby, a one year old Jack Russell Terrier, to join in the festivities at the start of the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostRunners make their way along 51st Street as they compete in the half marathon in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostRunners take off from the start of the half marathon in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostRunners take off from the start of the half marathon in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostRunners get views of the Flatirons as the make their way along Jay Road as they compete in the half marathon in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostRunners make their way along North 51st Street as they compete in the half marathon in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostRunners make their way along North 51st Street as they compete in the half marathon in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostRunners make their way along North 51st Street as they compete in the half marathon in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostRunners get spectacular views of the Flatirons as they make their way along North 51st Street as they compete in the half marathon in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostRunners make their way along North 51st Street as they compete in the half marathon in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostOlive Foster, 1, holds a tea party for one as her parents David and Ashley, and their dog Walter, cheer on runners taking part in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver PostA runner runs past Van Gogh inspired artwork as she takes part in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
Helen H. Richardson, The Denver Post
1 of 22
Runner Luke Novack stretches before taking part in the marathon in the inaugural Boulderthon on Oct. 10, 2021, in Boulder.
By Helen H. Richardson | hrichardson@denverpost.com | The Denver Post
PUBLISHED: | UPDATED:
Getting your player ready...
The inaugural took place in Boulder, Colorado on October 10, 2021. The race, which took place under sunny skies and cool temperatures, included a half marathon and a full marathon that started at Boulder Reservoir and ended in downtown Boulder. Organizers said on their website that “we believe Boulder, one of the great running hubs of the country, deserves a signature, premier marathon.” The organization says that promoting the power of running can inspire, transform & improve lives. According to race director Phil Dumontet, 2,750 people registered for the race.
