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About RaceIndexOur methodologyData coverageCyclingTriathlon
  • Half Marathon
  • 21.4 km
  • Aspen
  • Event weekend starts
  • Sold out

Golden Leaf Half Marathon (Aspen) Half Marathon

This race edition

Race date
Date not confirmed for this distance
Race timezone
Timezone not confirmed
Edition status
Status not confirmed

Entry options

2026 edition

Entry options are not yet confirmed for this edition. Check the organiser before making plans.

Modelled energy-cost change 2.0% versus flat · net elevation -226 m

View verified GPS mapOfficial event website ↗
Plan my trainingPlan my paceData current as of

Decision summary

Golden Leaf Half Marathon (Aspen) Half Marathon at a glance

Route ascent
533 m

Lower than 11% of comparable mapped races

Cut-off average pace
9:49/km

3:30:00 total limit divided by distance. Check gun/chip timing and intermediate limits; allow time for stops.

Typical conditions
97/100

Historical race-date favourability, not a forecast

Evidence depth
40 verified facts

Stored GPS route

Quick answers

What runners ask first

Golden Leaf Half Marathon (Aspen) route map

raceindex.org has a GPS course file for Golden Leaf Half Marathon (Aspen), so runners can inspect the route line on the map. Elevation charts and ascent figures appear only when that file includes usable elevation data.

How hilly is the Golden Leaf Half Marathon (Aspen)?

The Golden Leaf Half Marathon (Aspen) route has 533 m of ascent, 759 m of descent and an estimated 2.0% grade-adjusted pace penalty versus a flat route.

Where does the Golden Leaf Half Marathon (Aspen) route go?

The Golden Leaf Half Marathon (Aspen) route starts at Fanny Hill, Snowmass Village (approx. 8,650 ft elevation) and finishes at Koch Park, Aspen. Underfoot, expect mixed mountain single-track trail and road; dirt with rocks and roots. It passes Fanny Hill, Government Trail, Elk Camp Road, Buttermilk Ski Area and Maroon Creek. Chosen by Trail Runner Magazine as one of 'America's 14 most scenic races'.

What should runners know on race day for the Golden Leaf Half Marathon (Aspen)?

2.

Race character

Scenery

  • Mountain
  • Countryside
  • Forest

Atmosphere

  • Scenic Tour
  • Wilderness
  • Destination

Terrain

  • Trail
  • Mixed
Elevation character
Net Downhill
Technicality
Moderate
Source-stated ascent
299 m
Net elevation
-223 m

The stored route produces 533 m of ascent, while a source states 299 m. GPS sampling and elevation models can produce different totals, so both are labelled rather than combined.

Entry, logistics and records

Records and field

Field size
750
Field cap
750

Entry requirements

Entry status
Sold out: Sourced entry status says this edition is sold out.
Cut-off
Race runs 8:00-11:30 a.m. (approx. 3.5 hour window)
Sold out
Yes
Qualification status
Not a Boston qualifier; backcountry mountain trail race with no qualifying standard.

Race day logistics

Aid stations
2
Finisher tee
Registration includes a t-shirt.

Access and course status

Start
Fanny Hill, Snowmass Village (approx. 8,650 ft elevation)
Finish
Koch Park, Aspen

Course facts

Course type
Point To Point
Surface
Mixed mountain single Track trail and road; dirt with rocks and roots.
Landmarks
Fanny Hill, Government Trail, Elk Camp Road, Buttermilk Ski Area, Maroon Creek, Koch Park
Notable features
  • Chosen by Trail Runner Magazine as one of 'America's 14 most scenic races'
  • held during the peak of Colorado's fall aspen colors
  • Registration includes the race, a Slow Groovin BBQ lunch at the finish, a t-shirt, bar and prize giveaway
  • age-group ribbons awarded
  • Follows the Government Trail, a single track contouring the mountainsides between Snowmass and Buttermilk before descending to the outskirts of Aspen

How hilly is the Golden Leaf Half Marathon (Aspen) Half Marathon?

27%19%23%12%19%
  • Steep descent 27%
  • Descent 19%
  • Flat 23%
  • Climb 12%
  • Steep climb 19%
Total ascent
533 m
Net elevation
−226 m
GAP factor
2.0%
Longest climb
2,590 m at 9.9%
Gradient mix and ascent are derived from the course geometry under our published normalisation, not taken from organiser marketing.

What are typical race-day conditions?

  • 11°CTypical temperature
  • 11 kphTypical wind
  • 1 mmTypical rainfall
  • 97Favourability /100
Typical conditions for the race date and locality, within the endurance-optimal window. These are climatological norms, not a forecast, and are shared across every distance at this event.

More race details

Is the Golden Leaf Half Marathon (Aspen) flat?

Its normalised GAP factor is 2.0% slower than a flat course, with about 533 m of total ascent.

How we calculated this

Published facts and derived model outputs on this page are tied to stored sources or a published, version-locked methodology. We show the provenance so runners, coaches and organisers can check it. Data on this page is current as of .

Derived numbers use scoring-methodology-v1.0.

Sources used on this page (3)

Read the full methodology →