Colorado Runner - Colorado's running news, events and results source

For Colorado runners, adventure isn’t something you plan — it’s part of your lifestyle. One morning you might be logging sunrise miles on the Front Range, and the next you’re boarding a flight to tackle a mountain race in Europe, a marathon in Tokyo, or a high-altitude training block in South…

In my early years as a sports nutritionist, fat was a four-letter word. The mantra Eat fat. get fat scared runners away from consuming any kind of dietary fat. I had to practically beg athletes to include some fat in each meal.

Well, there is not much more to be said on what turned into an amazing day of history making for the 2025 Tunnel Hill 50 Mile USATF National Championship. Along with the championship, Tunnel Hill hosted a marathon, 100K, and 100-mile event.