Boulder Ride Guide
Boulder is the cycling-mecca cliché for a reason. Dry climate, low humidity, and 300+ riding days a year. Wind off the foothills is the deciding factor on most rides.
Climatology
Crisp dry summers (60–88°F), short cool winters (15–55°F). Afternoon thunderstorms in July/August can build fast over the foothills. Chinook winds in winter can spike to 60 mph.
Season by season
Spring
Apr–MaySnow possible into May. Most riders watch for warm SW winds breaking up the cold.
Summer
Jun–AugBe off the high climbs by noon — afternoon storms are routine.
Fall
Sep–OctPeak ride season. Stable, dry, golden cottonwoods.
Winter
Nov–MarIndoor-on-snow-days, outdoor-on-sun-days. Chinooks can give you 70°F in February.
Signature rides
Lefthand Canyon
35 miSteady climb into a typical morning headwind, free tailwind home.
Hygiene Loop
28 miFlat, low-traffic, foothill-protected. Doable even on windy days.
Magnolia Road
22 miPunishing climb, otherworldly views. Don't do it if storms are forecast.
Frequently asked
Is Boulder a good place to cycle?
Boulder is the cycling-mecca cliché for a reason. Dry climate, low humidity, and 300+ riding days a year. Wind off the foothills is the deciding factor on most rides.
What is the weather like for cycling in Boulder?
Crisp dry summers (60–88°F), short cool winters (15–55°F). Afternoon thunderstorms in July/August can build fast over the foothills. Chinook winds in winter can spike to 60 mph.
What are the best bike rides in Boulder?
Standout routes include Lefthand Canyon (35 mi), Hygiene Loop (28 mi), Magnolia Road (22 mi).
Nearby guides
From the blog
What the 0–10 Ride Score means, which weather factors drive it, and how to use it to pick the best day and time to ride.
A temperature-by-temperature guide to dressing for cold-weather cycling — from cool 60°F mornings down to freezing rides.
Wind is the most underrated factor in cycling. Here's how to read it and plan routes so the hardest effort comes first.
Want today's Ride Score and what to wear in Boulder?