This is an great alternative if you're not up to the black diamond Lower Bitterbrush challenge. It's primarily uphill all the way to the top of Nelson Loop, then almost all downhill flow and intermediate rocks back to the parking lot. Suggest riding Nelson Loop clockwise, providing a shorter, steeper climb to the top, with a longer downhill experience. For more of a workout, you can do more than one loop around Nelson Loop. This ride is rated blue for technical rocks & roots and moderate climbing.
The Antelope parking lot is very small and there's no parking on the road, so starting in Lyons and riding to the trailhead makes for a stress-free warm-up. Start up Antelope, and climb to the top of Lower Bitterbrush. Next, head right on Upper Bitterbrush. Now you are at Nelson Loop. Take a lap (or three) then head back down Upper Bitterbrush and Antelope.
Local Trail Association
Boulder Mountainbike Alliance (bouldermountainbike.org)Stats
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Distance7 miles
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Avg time1 hr 14 min
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Altitude min5,613 ft
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Altitude start5,613 ft
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Altitude end5,620 ft
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Climb1,191 ft
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Descent-1,185 ft
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Grade max-33.7%
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Grade min37%
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Distance climb3 miles
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Distance down3 miles
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Distance flat614 ft
7 Reviews & Comments
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Trails in Route
| 4,921 ft | |||||
| 1 mile | |||||
| 2 miles | |||||
| 1 mile | |||||
| 4,921 ft |
Details
- Featured
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Riding area
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Primary ActivityMountain Bike
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Other Activities
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Difficulty ratingBlue
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Route TypeOut & Back
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eBike Allowed
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Bike typeAM, XC
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Physical ratingModerate
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Ridelogs
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Recent Trail Reports Along Route
| status | trail | date | condition | description |
|---|---|---|---|---|
Jun 10, 2026 @ 6:03pm (America/Denver) Jun 10, 2026 | ||||
Jun 10, 2026 @ 6:03pm (America/Denver) Jun 10, 2026 | ||||
Jun 10, 2026 @ 6:03pm (America/Denver) Jun 10, 2026 |
- By fredcook
& contributors - #16078 - 4,598 views


