The Lead King Loop 25K, 8M, Kids Run returns to Marble, Colorado on September 13th. This event offers a choice between the challenging 25K Lead King Loop and the scenic 8-Mile Quarry Climb, both starting from and returning to the town of Crystal. Race morning finds participants gathered at the base of the iconic Crystal Mill, surrounded by towering peaks of the Elk Mountains. The atmosphere is one of anticipation as runners prepare for their journey through the historic Town of Crystal. The route winds through Lead King Basin, offering breathtaking mountain views that change colors with each step in late summer and early fall. The Lead King Loop 25K has been a local tradition since its inception, now running into its tenth year. With over 100 participants annually, this race stands as the highlight of Marble's autumn calendar. The proceeds benefit the Marble Charter School, ensuring that every runner contributes to education in their community. Course and conditions offer both challenge and beauty. The Lead King Loop follows a firm but slightly soft terrain through diverse landscapes. Participants will navigate around Crystal Mill before descending into Lead King Basin for the majority of the race distance. Similarly, the 8-Mile Quarry Climb offers stunning views along the Yule Marble Quarry Road, encircled by the majestic Maroon Bells-Snowmass and Ragged Wilderness areas. Weather on September 13th typically ranges from a minimum temperature of 6 degrees Celsius to a maximum of 20 degrees. The day will feel comfortable with an average of 13 degrees, accompanied by light winds that average around 5.4 kilometers per hour. Humidity levels are moderate at 49%, and while there is some risk of rain—averaging just over one millimeter—the weather promises clear skies for the majority of race time.
Registration can be completed online via https://raceroster.com/events/2026/116010/lead-king-loop-25k-8m-kids-run. Registration for both adult races costs $76.88, while the Kids 2.5K - Marble Charter School Students and Kids 2.5K Race each cost $18.04 and $23.39 respectively. Participants should register by September 1st to secure their spot in this memorable event. Bibs can be picked up at Crystal Elementary School from August 27th until race morning, with runners required to bring a form of photo ID for verification purposes. The start location is the Town Square in Marble; participants must be 18 years or older. First-timers should arrive prepared with comfortable running gear and proper footwear, along with any necessary documentation. This event matters because it supports local education while offering breathtaking views and challenging routes through one of Colorado's most beautiful regions. The Lead King Loop is a testament to community spirit and dedication to the next generation.
Races Offered
25K
Sep 13, 2026
straighten
Distance —
25km
terrain
Type —
Running
timer
07:00
sell
$114.33
8 Mile Quarry Climb
Sep 13, 2026
straighten
Distance —
8mi
terrain
Type —
Running
timer
07:00
sell
$76.88
Kids 2.5K - Marble Charter School Students
Sep 13, 2026
straighten
Distance —
2km
terrain
Type —
Running
timer
07:00
sell
$18.04
Kids 2.5K Race
Sep 13, 2026
straighten
Distance —
2km
terrain
Type —
Running
timer
07:00
sell
$23.39
Weather History
These values represent the 3-year monthly averages for September in Marble.
thermostatTemperature
6.2° / 19.8°
wb_sunnyFeels like
3.5° / 16.3°
light_mode
Avg sunshine hours
11h 35m
water_drop
Avg rainfall
1.1 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
5.4 km/h (Light breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (5.0)
humidity_mid
Humidity
49.0%
wb_twilight
Sunrise
06:50
nightlight
Sunset
19:16
About Marble
Learn more about the host city, Marble.
The Town of Marble is a Statutory Town in Gunnison County, Colorado, United States. The town population was 133 at the 2020 United States census.
