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    Difficulty
    This reflects the 10Adventures difficulty rating for each route. We aim to keep ratings consistent across regions.
    Moderate
    Elevation
    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.
    221 m
    Distance
    This reflects the return distance of this route as measured by the GPS file.
    27.9 km
    Duration
    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.
    2.5h
    User Ratings
    These ratings are completed by users who have completed this trail and not subject to reviews by 10Adventures.
    Intermediate (Square)
    Suitable for intermediates who are ready for a little bit more adventure.
    Physical DIFF
    Intermediate (Square)
    Suitable for intermediates who are ready for a little bit more adventure.
    Technical DIFF
    Directions to Trailhead

    N 63rd St

    Panorama on N 63rd St loop road biking route in Boulder, Colorado
    Measurement:

    Download an interactive map and guide on your phone today!

    Table of contents

    N 63rd St is the classic Boulder loop with gently rolling hills and mountain views! The nicely paved road with a generous shoulder is perfect for a stress-free day on the bike.

    Route Description for N 63rd St

    Ride north on 63rd St, heading out of town through rural landscape with wide open views. Gently rolling hills will continue on for as far as the eye can see. After a short climb and an old church, you will have a quick downhill section to the junction of 63rd St and Nelson Rd.

    Turn left onto Nelson Rd. heading west towards the mountains. A gradual climb will have you cycling past the NOAA Table Mountain Test Facility. After a slight jog in the road, you will arrive at the junction of Nelson Rd and US 36.

    Take US 36 south to Neva Rd., then turn onto Neva Rd. heading east. After a couple of short, punchy climbs, you will enter a sharp right-hand turn followed by an immediate left-hand turn onto Niwot Rd. This is the “turn and burn” section of this ride with a slight downhill, where you can put it in the large chainring and catch a tail wind, as you pedal to a max speed for an all-out effort. Niwot Rd. will reconnect with 63rd St. at the stop sign. Turn right heading south on 63rd St to head back to Tom Watson Park.

    Insider Hints for N 63rd St

    • If it is a windy day in Boulder, it will be even windier on the N 63rd Street bike ride!
    • There are a number of variations to this bike ride, feel free to turn on your GPS and explore the many roads that branch off of 63rd St.

    Getting to the N 63rd St Trailhead

    From Boulder, head northeast along the Diagonal Hwy(119). Take 63rd St. north for a quarter mile to Tom Watson Park.

    Route Information

    • Type of Ride:

      Single-day

    • Re-supply points:

      None

    • When to do:

      Year round

    • Toilets:

      Tom Watson Park

    • Level of Car Traffic:

      Moderate

    • Road Type:

      Shared roads with cars

    • Family friendly:

      No

    • Route Signage:

      Average

    • Crowd Levels:

      Moderate

    • Route Type:

      Loop

    N 63rd St Elevation Graph

    Weather Forecast

    Check Area Weather

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