The Cougar Slayer
ElevationAscent: 8,965' 2,733 m
Descent: -11,815' -3,601 m
High: 10,589' 3,228 m
Low: 5,588' 1,703 m
GradeAvg Grade: 6% (3°)
Max Grade: 35% (19°)
Popular rides nearby
Rhythm & Blues
10.0 mi 16.1 km • Loop • 881 ft Ascent 268.67 m Ascent
East Mag Dots
11.6 mi 18.6 km • Loop • 1,115 ft Ascent 340 m Ascent
West Mag Backcountry Big Ride
12.5 mi 20.1 km • Loop • 1,337 ft Ascent 407.39 m Ascent
North Sourdough and St. Vrain Loop
5.4 mi 8.7 km • Point to Point • 641 ft Ascent 195.34 m Ascent
Coney Buchanan Loop
11.6 mi 18.6 km • Loop • 1,467 ft Ascent 447.04 m Ascent
7.0 mi 11.2 km • Loop • 1,508 ft Ascent 459.52 m Ascent
“The course of the eponymous underground, unsanctioned, unofficial, mountain bike race/adventure.”— Jim Mapes
This has been hidden from our maps to prevent overlap with existing trails, or because our research has found there is no legal access.
Electric Mountain Bikes Unknown
Note: This is a giant ride, and has gotten a bit of a cult following. Check out the dedicated website for more information: thecougarslayer.com/
Need to Know
Once in Caribou, climb Caribou Road briefly and descend Sherwood Forest. Youll pop out close to Mud Lake, get on the dirt rd to the Peak to Peak highway. After passing Sugarloaf Road on the right take your next left on the frontage road entrance (CR103). Stay on this until it ends back at the Peak to Peak highway, dont get off early.
Ride down Peak to Peak to the Colorado Research Center Road entrance, Sourdough Trail. Ride the full Sourdough Trail (Sourdough Trail - Southern Half, North Sourdough) to the Brainard Lake parking lot. Ride the South Saint Vrain Trail to the Peak to Peak highway. Turn right (south) on the Peak to Peak, take the first left on the CR103 then hang a slight right which becomes 100 to Gold Hill Rd.
Take a right on 372 which goes around Gold Lake and merges with 509. Continue on the main dirt rd, taking a hard left on to Strava segment hooter. Hooter Ts at the end, take a right and follow the dirt Rd to the next T. take a left followed by an immediate right.
Follow it up to the top. Hit a rocky and fun descent to the top of Slaughter House Gulch and Flying Squirrel. Drop down directly south on Flying Squirrel / county rd 509 then up Lefthand Canyon to Lick Skillet Road. Ride Up Lick Skillet Road to Gold Hill.
Continue West through Gold Hill. Descend Todds Gulch at the intersection of Gold Hill Road and Switzerland Trail. Go right on Switzerland Trail to the Sugarloaf parking lot. From the parking lot take the Switzerland trail west to dirt rd 233C. 233C merges with Gordons Gulch right were it becomes fun.
After the descent continue on Primos Road to Sugarloaf paved road. From Sugarloaf take a left on Labelle dirt road. Descend Arkansas Mountain to the Sugarloaf paved road. Left to Betasso, down Link trail. Ride down Colorado 119 (Canyon) to the Boulder Creek Path(entrance at large gravel turnout on right). Finish up on the Boulder Creek Path to Eben G. Fine gazebo."
History & Background
Land Manager: USFS - Boulder Ranger District Office