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Colorado Mountain Half+ Series 2026

United States flag
Littleton, Colorado, United States

calendar_today 13 Sep, 2026 – 08 Aug, 2026

directions_run Running

language Official Website

sell $3.06 – $387.15

Register Now
Colorado Mountain Half+ Series 2026

About the Event

RUN AMONG THE PEAKS⛰️Estes Park⛰️Georgetown to Idaho Springs⛰️Mt. Sneffels⛰️Ned Ned Trail Fest⛰️Lead King LoopWe all love a Colorado original - and nothing feels quite like running at altitude (literally)!Four of Colorado's most beloved half marathons, plus one unforgettable 25K, have joined forces with HAL Sports to create theColorado Mountain Half+ Series!This isn't just a series of races. It's an invitation toRun Among the Peaks!And what's more, the invitation is super flexible: sign up for any3, 4, or ALL 5 events!From breathtaking views to challenging climbs, each course showcases Colorado at its best - challenging, inspiring, and unforgettable. Some will take your best effort, but all of them will have you bragging about your success every chance you get!What's more: every event in the series is proudly organized by nonprofits that support local youth programs, meaning every mile you run helps strengthen our communities and the next generation.Why should you register for the Series?~Because you're not afraid of a little altitude!~Because you want to explore our beautiful State.~Because collecting points at every race and chasing series awards sounds way more fun that sitting on the couch!~AND because medals look way better at altitude.

Races Offered

5-Event Series

Sep 13, 2026

straighten

Distance — 21K

terrain

Type — Running

timer

07:00

sell

$3.06

Series 3 Pack

Sep 13, 2026

straighten

Distance — 21K

terrain

Type — Running

timer

07:00

sell

$290.86

Series 4 Pack

Sep 13, 2026

straighten

Distance — 21K

terrain

Type — Running

timer

07:00

sell

$387.15

Weather History

These values represent the 3-year monthly averages for September in Littleton.

thermostat Temperature
17.4° / 27.7°
wb_sunny Feels like
17.4° / 27.9°
light_mode Avg sunshine hours
12h 8m
water_drop Avg rainfall
3.3 mm
ac_unit Avg snowfall
—
air Avg wind speed
9.7 km/h (Light breeze)
opacity Sweat loss rate
High
terrain Course conditions
Hard and dry surface
sunny Max UV Index
Very High (8.0)
humidity_mid Humidity
71.8%
wb_twilight Sunrise
06:15
nightlight Sunset
21:12

About Littleton

Learn more about the host city, Littleton.

Scenic view of

Canton is a township of almost 100,000 people (2020) in Wayne County in the state of Michigan.

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Hotels & Places to Stay

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