5.8 miles
Distance
1,060 ft
Climb
-1,063 ft
Descent
2 miles
High Point

This ride is one of the funnest stretches of creekside singletrack in Boulder County...followed by a heinous climb up to Miller Rock. From the trailhead you ride downhill following narrow, twisty singletrack - super flowy with the occasional tough technical move. And don't fall on those technical spots either as the steep drop to South St. Vrain Creek has claimed more than a few collarbones over the years.

At the bottom of the singletrack descent, take stock of your will power. The climb up to Miller Rock is a doozie, and don't forget you'll be climbing back out to the trailhead. Miller Rock is well worth it, though, with some of the best views of the Continental Divide around. Local lore has it that a man named Miller took refuge on the rock after a lynch mob came after him for stealing a horse (think about how bikers feel about bike thieves). Miller, being such a smart thief, snuck on top of the rock where he waited the lynch mob out...until he starved to death the tale goes.

There are two ways to get up to Miller Rock, and they are both heinous. We recommend the counterclockwise loop as the hair-raising descent is super fun in that direction. Bring a map as the roads and trails get confusing around here. First you'll ride, push, and carry your bike uphill on a nasty jeep road that has degraded into fields of babyheads in places. Once you flatten out bear left at the second intersection and continue up the jeep road to the base of Miller Rock.

For a nice view and a sweet snack spot, get off your bike, walk around to the backside of the rock, and scramble up. Once you've had your fill of the expansive views, get back on your bike and continue on until you see a trail to the left (continuing straight takes you to private property). This singletrack descent goes from fast and flowy to downright death-defying. Have fun, but remember how far from civilization you are at this point. The pucker factor weeds a lot of people off this trail after the first attempt. Once you are safely at the bottom again, it's time to ride back up the creekside singletrack to the trailhead.

Local Trail Association
Boulder Mountainbike Alliance (bouldermountainbike.org)
Please consider joining or donating to the local riding association to support trail development & maintenance.
donate to earn trail karma!

Trail Products

Comments


Post a Comment



Details

  • Riding area
  • Primary Activity
    Mountain Bike
  • Other Activities
    • Hike
    • Trail Running
    • Horse
    • Snowshoe
    • Nordic Ski
  • Difficulty rating
    Black Diamond
  • Route Type
    Loop
  • eBike Allowed
  • Bike type
    AM, XC
  • Direction
    Both Directions
  • Physical rating
    Hard
  • Ridelogs
    1
More Stats for Ceran St Vrain/Miller Rock Loop mountain bike route
  • Altitude min
    8,003 ft
  • Altitude start
    8,293 ft
  • Altitude end
    8,294 ft
  • Grade
    -0%
  • Grade max
    -43.9%
  • Grade min
    52.5%
  • Distance climb
    3 miles
  • Distance down
    3 miles
  • Distance flat
    3,632 ft
no votes yet
close
Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
Trail Ridden Direction
Trailforks scans users ridelogs to determine the most popular direction each trail is ridden. A good flowing trail network will have most trails flowing in a single direction according to their intension.
The colour categories are based on what percentage of riders are riding a trail in its intended direction.
  • > 96%
  • > 90%
  • > 80%
  • > 70%
  • > 50%
  • < 50%
Trail Last Ridden
Trailforks scans ridelogs to determine the last time a trail was ridden.
  • < 2 days
  • < 1 week
  • < 2 weeks
  • < 1 month
  • < 6 months
  • > 6 months
Trail Ridden Direction
The intended direction a trail should be ridden.
  • Downhill Only
  • Downhill Primary
  • Both Directions
  • Uphill Primary
  • Uphill Only
  • One Direction
Contribute Details
Colors indicate trail is missing specified detail.
  • Description
  • Photos
  • Description & Photos
  • Videos
Trail Popularity ?
Trailforks scans ridelogs to determine which trails are ridden the most in the last 9 months. Trails are compared with nearby trails in the same city region with a possible 25 colour shades. Think of this as a heatmap, more rides = more kinetic energy = warmer colors.
  • most popular
  • popular
  • less popular
  • not popular
ATV/ORV/OHV Filter
Max Vehicle Width
inches

Radar Time
Trail transparency

Recent Trail Reports Along Route

statustraildateconditiondescription
Ceran Saint Vrain Trail
Jun 8, 2021 @ 3:52pm
Jun 8, 2021
Miller Rock Spur Road Connector
Dec 12, 2020 @ 9:28am
Dec 12, 2020
A light covering of snow. Some patches of ice underneath.
Miller Rock Descent
Dec 12, 2020 @ 9:28am
Dec 12, 2020
A light covering of snow. Some patches of ice underneath.
more reports »
  • flag
  • login to download gpx or kml files.