RacesReviewed / Race Intelligence

Blue Sky Trail Marathon & Half Marathon

Runners rave that the Blue Sky Trail Marathon delivers a true mountain test, with the notorious hogback miles 15‑20 full of slanted rocks that even the elevation profile understates, while volunteers know your name, place brilliant pink/blue color‑blind‑friendly markers, and serve altitude‑adjusted post‑race chili. The course is actually closer to 27 miles, adds relentless technical ankle‑grabbing sections, and can be wind‑exposed on the back half, yet the sweeping Horsetooth Reservoir vistas, plush SmartWool hats and unique rock‑coaster awards make the extra mileage and effort feel worthwhile. First‑time trail racers are warned that the climb up Towers Trail (1,500 ft in 3 mi) is a steep wake‑up, the final miles roll on endlessly, and spectator access is limited on the single‑track, but the community’s real support and sustainability focus earn it a special spot among Colorado’s trail events.