Blue Sky Trail Marathon

Index card: facts and a plan, no score. RaceWorth scores only the fly-for-this catalog.

Blue Sky Trailhead, Horsetooth Mountain Park, Fort Collins, Colorado, United States

Index card · facts and a plan

The card

Blue Sky Trail Marathon starts 7:00am on October 17, 2026 at the Blue Sky Trailhead west of Fort Collins, covering 26.7 miles with about 3,500 feet of gain between 5,300 and 6,500 feet. Gnar Runners publishes a full aid and cutoff table (Blue Sky mile 9.2 at 10:00am; Indian Summer South 15.6 at 12:30pm and 20.3 at 1:45pm; finish 4:00pm / 9 hours), GPX, and a 400-runner cap with waitlist. Crew only at the Blue Sky start/finish (mile 9.2); pacers not allowed; drop bags at start/finish for the mile-9.2 pickup. Cupless fluids. OpenSplitTime counted 143 / 186 / 222 finishers in 2025 / 2024 / 2023.

Weekend

Official handbook facts

Start: 07:00
Crew: 0, 9.2, 26.7 mi
Drop bags: 0, 9.2 mi
Pacer: Unpublished, checked 2026-09-06
Kit: Required · Minimum 16oz bottle or bladder required; no water cups at aid (cupless fluids).
Course file: Open

Printable cutoff card

Gnar Runners Blue Sky Marathon & Half event page · retrieved 2026-09-06 (repo record)

Aid and cutoffs

2026 edition

Towers4.4 mi
Blue Sky (Start/Finish)9.2 mi · 3h cutoff
Indian Summer North 113.2 mi
Indian Summer South 115.6 mi · 5.5h cutoff
Hunter Turnaround17.9 mi
Indian Summer South 220.3 mi · 6.75h cutoff
Indian Summer North 222.7 mi
Finish26.7 mi · 9h cutoff

gnarrunners.comretrieved 2026-09-06 (repo record)

Required kit

2026 edition · RD list

16oz minimum water bottle or bladder
16oz+
Required - no water cups at aid stations.

Race rules require carrying refillable fluid capacity; poles/traction need prior staff approval.

gnarrunners.comretrieved 2026-09-06

Full kit page

Field

Last editions · Marathon scored distance

Field evidence: who showed up, who finished, how long. DNF is that evidence, not a difficulty score. Public results, scored distance only.

2025

Counted 143 Finished status cells on the OpenSplitTime full spread for Blue Sky Trail Marathon 2025.

Starters: .
Finishers: 143
DNF: –
Win: .
Median: .

2024

Counted 186 Finished status cells on the 2024 Trail Marathon spread.

Starters: .
Finishers: 186
DNF: –
Win: .
Median: .

2023

Counted 222 Finished status cells on the 2023 Trail Marathon spread.

Starters: .
Finishers: 222
DNF: –
Win: .
Median: .

Field evidence: who showed up, who finished, how long. DNF is that evidence, not a difficulty score. Public results, scored distance only.
Year	Starters	Finishers	DNF	Win	Median
2025Counted 143 Finished status cells on the OpenSplitTime full spread for Blue Sky Trail Marathon 2025.retrieved 2026-09-06 (repo record)	.	143	–	.	.
2024Counted 186 Finished status cells on the 2024 Trail Marathon spread.retrieved 2026-09-06 (repo record)	.	186	–	.	.
2023Counted 222 Finished status cells on the 2023 Trail Marathon spread.retrieved 2026-09-06 (repo record)	.	222	–	.	.

Overall field only. Not a pro or sponsored subset.

Map

Official course map ↗

RD-linked interactive map / course spreadsheet from Blue Sky page

Retrieved 2026-09-06