Blue Sky Marathon & Half: Additional Info

Registration 2025

Start: Blue Sky Trailhead, Horsetooth Mountain Park. Fort Collins, Colorado
Distance: 26.7 miles (3,500′) or 13.4 miles (1,800′)
Min/Max Elevation: 5,300′-6,500′
Average Elevation: 5,700′ Marathon
Terrain: Marathon: 22mi dirt singletrack, 3mi rocky singletrack, 2mi dirt road; Half Marathon: 13.0mi dirt singletrack, 0.5mi dirt road
Fauna: Deer, abert squirrel, golden eagle
Registration Cap: 400 Marathon / 400 Half
Time Allowance: 9 hours Marathon / 6 hours Half Marathon
Dates: October 18 (Marathon) / October 19 (Half Marathon), 2025

Awards

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

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. Currently, we are offering non-binary recognition for the top 3 overall in that category, and will expand to age groups as participation levels grow.

1st, 2nd, and 3rd Place Overall Awards for the top men’s and women’s finishers in each distance.

Age Group Awards for the top 3 men and women 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

As well as 1st-3rd Overall for the non-binary category.

**Runners who switch distances on Friday or before will be eligible for awards in their new race duration category. Race day switches are not eligible for awards.**

Travel

Camping is available near the race start at the Horsetooth Reservoir Inlet Bay campground (marathon) and South Bay campground (half marathon). 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 for the Marathon, and spots S05 through S14 (plus cabins 1-5) will be closest to the South Bay start/finish for the Half Marathon. Inlet Bay Campground Map | South Bay 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.

Results

2024 Marathon
2024 Half Marathon

2023 Marathon
2023 Half 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

Men:	Ryan Sullivan	Grand Junction, Colorado	3:06:17	2024
Women:	Hannah Allgood	Colorado Springs, Colorado	3:33:57	2022
Masters Men:	Frank Pipp	Longmont, Colorado	3:17:22	2018
Masters Women:	Anita Ortiz	Eagle, Colorado	3:54:11	2014

Oldest/Youngest Finishers

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

Half Marathon Course Records

Men:	Michael Gingras	Fort Collins, Colorado	1:39:10	2023
	*Andy Ames ran a 1:24:39 on the old course in 2009
Women:	Nicole Esplin	Boulder, Colorado	1:42:36	2023
	*Susan Nuzum ran a 1:41:44 on the old course in 2009
Masters Men:	Scott Voorhees	Fort Collins, Colorado	1:52:11	2023
	*Andy Ames ran a 1:24:39 on the old course in 2009
Masters Women:	Tina Jones	Fort Collins, Colorado	2:20:09	2023
	*Susan Nuzum ran a 1:41:44 on the old course in 2009

Oldest/Youngest Finishers

Oldest Man:	Glen Neumann, 77	Greeley, Colorado	2:39:29	2008
Oldest Woman:	Kathy Kirsling, 75	Tijeras, New Mexico	5:11:35	2024
Youngest Man:	Jackson Chamberlain, 10	Littleton, Colorado	2:39:06	2008
Youngest Woman:	Sydney Stahl, 18	Vancouver, Washington	2:43:36	2023