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    This reflects the 10Adventures difficulty rating for each route. We aim to keep ratings consistent across regions.
    This reflects the total elevation gained throughout this route as measured by the GPS file. This includes all ascents and descents, and is higher than what is quoted in most route guides, which simply measure the distance between the starting-point and high-point of the route.
    340 m
    This reflects the return distance of this route as measured by the GPS file.
    38.8 km
    This reflects the estimated time the majority of users will take on this trail. If you are slower, add time to the top-end figure. If you are fast, then you may complete this route faster than this time range.
    User Ratings
    These ratings are completed by users who have completed this trail and not subject to reviews by 10Adventures.
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    Directions to Trailhead

    US 36 to Lyons

    Panorama on US 36 to Lyons road biking route in Boulder, Colorado

    Download an interactive map and guide on your phone today!

    Table of contents

    US 36 to Lyons is a popular bike ride that serves as a training ground for many professional athletes; sections of this bike ride are a part of the official Iron Man Boulder bike course! It is for that reason, we included this ride on the Top 10 Boulder rides.

    Route Description for US 36 to Lyons

    Local Boulder cyclists like to get out on US 36 for a day training. Here we share a shortened route for recreational cyclists. US 36 is a busy road with a wide shoulder, providing some space and comfort from the large amount of traffic that is present on this road throughout all times of the day. The road parallels the Colorado Front Range along gently rolling hills, making for a beautiful scenic bike ride with minimal effort.

    As you cycle out of Boulder , the views open up as you pass by Hogback Ridge, North Boulder Valley, and the entrance to Left Hand Canyon. The gently rolling hills slowly gain elevation until around 8 miles into the ride, where you will enjoy a long downhill section all the way to Lyons. At a junction in the road and a stop light, turnaround and ride back the way you came.

    Insider Hints for US 36 to Lyons

    • Crosswinds can be an issue on this bike ride, if it is windy, be careful.
    • Try riding early in the morning on the weekends to avoid heavy traffic.

    Getting to the US 36 to Lyons Trailhead

    From Boulder, head north on 28th St. until it turns into US 36. Parking is available at a dirt pullout off of 26th St. on the north side of US 36.

    Route Information

    • Type of Ride:


    • Re-supply points:


    • When to do:

      Year round

    • Toilets:


    • Level of Car Traffic:


    • Road Type:

      Shared roads with cars

    • Family friendly:


    • Route Signage:


    • Crowd Levels:


    • Route Type:

      Out and back

    US 36 to Lyons Elevation Graph

    Weather Forecast

    Check Area Weather


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