Blue Sky Marathon & Half: Additional Info

Registration 2024

  • Start: Blue Sky Trailhead, Horsetooth Mountain Park. Fort Collins, Colorado
  • Distance: 26.7 miles (3,500′) or 13.5 miles (1,500′)
  • Min/Max Elevation: 5,300′-6,500′ Marathon / 5,300′-5,700′ Half
  • Average Elevation: 5,700′ Marathon / 5,500′ Half
  • Terrain: Marathon: 22mi dirt singletrack, 3mi rocky singletrack, 2mi dirt road; Half Marathon: 11mi dirt singletrack, 1mi rocky singletrack, 1.5mi dirt road
  • Fauna: Deer, abert squirrel, golden eagle
  • Registration Cap: 375
  • Time Allowance: 9 hours Marathon / 8hr15min Half Marathon
  • Date: October 19, 2024


All runners who finish within the official course cut-off will receive a unique finisher’s award.

The post race awards and raffle will be held at the Blue Sky trailhead finish area.

The Awards and Raffle will be held at 1:30pm.

We acknowledge and respect those who experience their gender identity in ways outside of the traditional male/female dichotomy, and are trying our best to provide non-binary opportunities in both the registration and results to reflect that. For the purposes of overall/age-group awards, non-binary runners will be eligible in their birth gender pool.

1st, 2nd, and 3rd Place Overall Awards for the top male and female finishers in each distance.

Age Group Awards for the top 3 male and female in each of the following age groups (overall winners not eligible) for both distances:

  • Under 40
  • 40 to 49
  • 50 to 59
  • 60 and Over

We will also raffle off additional prizes from our generous sponsors after the race. You must be present (or still on the course) to collect raffle prizes!


Camping is available near the race start at the Horsetooth Reservoir Inlet Bay campground. On race weekend, there should be plenty of open camp spaces. Spots I23 through I26 at the south end of the campground will be the closest to the Blue Sky Trailhead start/finish area.(Campground Map)

There are a multitude of hotels for every budget in Fort Collins, and any within city limits will be no more than a 20-30 minute drive from the start.


2023 Marathon
2023 Half Marathon

2022 Marathon

2021 Marathon

2020 Marathon

2019 Marathon

2018 Marathon

2017 Marathon

2016 Marathon

2015 Marathon

2014 Marathon

2013 Marathon

2012 Marathon

2011 Half Marathon
2011 Half Marathon Age Group
2011 Marathon
2011 Marathon Age Group

2010 Half Marathon
2010 Half Marathon Age Group
2010 Marathon
2010 Marathon Age Group

2009 50k
2009 Marathon
2009 Half Marathon

2008 Marathon & Half Marathon

Marathon Course Records

Male: David Roche Boulder, Colorado 3:09:59 2023
Female: Hannah Allgood Colorado Springs, Colorado 3:33:57 2022
Masters Male: Frank Pipp Longmont, Colorado 3:17:22 2018
Masters Female: Anita Ortiz Eagle, Colorado 3:54:11 2014

Oldest/Youngest Finishers

Oldest Male: Juergen Kuhlmey, 78 Fort Lauderdale, Florida 7:57:48 2016
Oldest Female: Carol Young, 69 Houston, Texas 8:32:51 2015
Youngest Males: Noah Kieser, 16 & Jaden Rivera, 16 Longmont, Colorado & Murrieta, CA 4:58:34 & 7:07:46 2017 & 2023
Youngest Female: Hazel Hust, 15 Colorado Springs, Colorado 5:27:16 2022

Photos & Reports

2023 Photos – Finish (Valerie Collins)
2023 Photos – Pablo Pinedo
2023 Photos – Terry Grenwelge (Half Marathon)
2023 Photos – Terry Grenwelge (Marathon)

2022 Photos – Finish (Ondra Augusta)
2022 Photos – Horsetooth (Forrest Barton)
2022 Photos – Blue Sky Trail
2022 Photos – Blue Sky Trail (Indian Summer)

2021 Photos – Jennifer Elle Photography (Towers)
2021 Photos – Terry Grenwelge (Blue Sky Aid, Road Crossing)
2021 Photos – Craig Person (Hunter Loop)

2020 Photos – Jennifer Elle Photography (Towers)
2020 Photos – Ed Delosh (Start/Finish)

2019 Photos – Erin Bibeau (Towers)
2019 Photos – Terry Grenwelge (Mile 9/Finish)

2017 Photos – Erin Bibeau (Hunter Turn, 17.9)
2017 Photos – Terry Grenwelge (Mile 9/Finish)

2016 Photos from Erin Bibeau Photography (Towers Aid & Finish)
2016 Photos from Brad Olwin at Laughing Horse

2015 Photos from Erin Bibeau Photography (Devils Backbone)
2015 Photos from Terry Grenwelge (Indian Summer)
2015 Photos from Cameron Cross (Devil’s Backbone)
2015 Photos from Tena at O Photography: First Climb up Towers, Stout Trail, and the Finish Line

2014 Photos from Erin Bibeau Photography (Horsetooth)
2014 Photos from the Coloradoan

2013 Photos from Erin Bibeau Photography

2012 Photos from Erin Bibeau Photography

2011 Photos from Erin Bibeau Photography

2010 Indian Summer Photos from Erin Bibeau Photography