6.7 miles
Distance
1,191 ft
Climb
-1,185 ft
Descent
1 mile
High Point
6 ft
Altitude change
5,613 ft
Altitude min
5,613 ft
Altitude start
5,620 ft
Altitude end
-33.7%
Grade max
37%
Grade min
3 miles
Distance climb
3 miles
Distance down
614 ft
Distance flat

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.

Detailed Description
Hall Ranch: Intermediate Fun is a 7 mile popular intermediate route located near Lyons Colorado. This mountain bike primary route and has a moderate overall physical rating. This route includes 5 trails. This route climbs 1,191 ft with a max elevation of 6,688 ft then descends -1,185 ft.
Local Trail Association
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Boulder Mountainbike Alliance (bouldermountainbike.org)
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Stats

  • Distance
    7 miles
  • Avg time
    1 hr 14 min
  • Altitude min
    5,613 ft
  • Altitude start
    5,613 ft
  • Altitude end
    5,620 ft
  • Climb
    1,191 ft
  • Descent
    -1,185 ft
  • Grade max
    -33.7%
  • Grade min
    37%
  • Distance climb
    3 miles
  • Distance down
    3 miles
  • Distance flat
    614 ft

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  • Featured
  • Riding area
  • Primary Activity
    Mountain Bike
  • Other Activities
    • Horse
    • Hike
    • Trail Running
  • Difficulty rating
    Blue
  • Route Type
    Out & Back
  • eBike Allowed
  • Bike type
    AM, XC
  • Physical rating
    Moderate
  • Ridelogs
    610
Avg: 4.35 (3 votes)
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    • Singletrack
    82
    70
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    87
    Upper Bitterbrush - Downhill
    Upper Bitterbrush - Downhill
    5:14 | 84 | comments: 0 | favs:
    May 13, 2025
    Nelson Loop
    Nelson Loop
    9:03 | 57 | comments: 0 | favs:
    May 13, 2025

    Recent Trail Reports Along Route

    statustraildateconditiondescription
    Antelope
    Jun 10, 2026 @ 6:03pm (America/Denver)
    Jun 10, 2026
    Nelson Loop
    Jun 10, 2026 @ 6:03pm (America/Denver)
    Jun 10, 2026
    Upper Bitterbrush
    Jun 10, 2026 @ 6:03pm (America/Denver)
    Jun 10, 2026
    more reports »
    • By fredcookTF Pro & contributors
    • #16078 - 4,598 views

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