Blue Heron Half Marathon and 5K
Thornton, Colorado, United States
Apr, 2027 (TBD)
5k, Half-marathon
Race Information
Take part in this fast, flat, and scenic run along the South Platter River! Low key, low cost, low stress, fully supported, timed event. Use it as your first half, or as a tune-up for your upcoming marathon! Organized by the Rocky Mountain Road Runners, one of the oldest run clubs in Colorado!
Elevation & Celebration: The Denver Summer Bundle is Here!
πΈ Save 25% When You Bundle!
3 Months. 3 Races. Your Ultimate Summer Challenge.
Denver runners, itβs time to take your summer to new heights! Registration is officially open for the Denver Summer Bundleβthe best way to stay motivated and active all summer long.
The 2026 Denver Lineup:
- π₯ July 11: Heatwave | 5k, 10k, Half, & Relay
- βοΈ August 8: Summer Sizzler | 5k, 10k, & 15k
- πΎ September 5: Golden Harvest | 5k, 10k, & Half
The Summer Bundle βοΈ is built for those who want the best value and a consistent summer goal. One registration gets you into all three races with a massive 25% discount! Prefer to take it one month at a time? No problem, individual race registration is open.
Lock in your summer goals today, secure your savings, and letβs show the Mile-High City what weβre made of!
π Training for This Race?
Get a personalized training plan that adapts for every run. RunDot analyzes every run and automatically adjusts your training plan.
π 2 weeks free for RunGuides runners
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Race Facts
Race Size: 100 - 500
Elevation: Fast and Flat
Course Type: Trail
Boston Qualifier: No
Kids Run: No
Where to Stay
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