Big Thompson–South Saint Vrain Mega Loop

Lyons, Colorado

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This route is a leg-breaker with tons of climbing and tons of miles. Start this one early, and carry plenty of fluids, food, and cold-weather gear. The most difficult ride in the book!

Big Thompson–South Saint Vrain Mega Loop Professional Review and Guide

"This route is a leg-breaker with tons of climbing and tons of miles. Start this one early, and carry plenty of fluids, food, and cold-weather gear. The most difficult ride in the book!"

Activity Type: Road Biking
Nearby City: Lyons
Distance: 78.9
Trail Type: Loop/Lollipop
Skill Level: Difficult
Riding Time: 5–6 hours
Season: Year-round
Local Maps: DeLorme: Colorado Atlas and Gazetteer, pp. 29–30

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