The High Lonesome 100 is a high-flying Colorado mountain race transecting the southern end of the expansive Sawatch Range. Starting and ending at the base of Mount Princeton, the loop course takes runners along soaring ridges, through idyllic meadows and remote basins, across 5 alpine passes, and through two ghost towns. Runners will be treated to 27 miles of the National Scenic Continental Divide Trail and 35 miles of the classic Colorado Trail. This course is wild, tough, and relentless, but with each aid station captained by a 100-mile race veteran, we'll give you the push you need to succeed.

Name Date and Time
2023 High Lonesome 100 Friday, July 21, 2023 6:00AM (MDT) 178 entrants
2022 High Lonesome 100 Friday, July 22, 2022 6:00AM (MDT) 143 entrants
2021 High Lonesome 100 Friday, July 30, 2021 6:00AM (MDT) 142 entrants
2019 High Lonesome 100 Friday, July 26, 2019 6:00AM (MDT) 125 entrants
2018 High Lonesome 100 Friday, August 3, 2018 6:00AM (MDT) 100 entrants
2017 High Lonesome 100 Friday, July 28, 2017 6:00AM (MDT) 73 entrants