20.2 miles
Distance
4,228 ft
Climb
-4,229 ft
Descent
1 mile
High Point
-1 ft
Altitude change
2,861 ft
Altitude min
2,893 ft
Altitude start
2,890 ft
Altitude end
-52.7%
Grade max
46.9%
Grade min
10 miles
Distance climb
9 miles
Distance down
3,934 ft
Distance flat

This route follows Trail 4 for a minimal amount of riding, which is a shared motorized trail.

A big Boise loop which climbs up a service road for most of the climb and down singletrack, with some intermixed single track traversing and climbing. It's a pretty exposed route but give you sweeping views of the entire Treasure Valley, the Owyhee Mountains, and - once on the approach to 5 Mile Gulch - distant views of the Southern Sawtooths.

8th Street
Trail 4
5 Mile Gulch
Watchman
3 Bears
Military Connector
Kestrel

Detailed Description
845W3 is a 20 mile moderately popular intermediate route located near Boise Idaho. This mountain bike only route can be used one direction and has a hard overall physical rating. This route includes 6 trails. This route climbs 4,228 ft with a max elevation of 5,885 ft then descends -4,229 ft.

Local Trail Association

Local trail association
Southwest Idaho Mountain Bicycling Association (www.swimba.org)
Please consider joining or donating to the local riding association to support trail development & maintenance.
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Stats

  • Distance
    20 miles
  • Avg time
    2 hr 36 min
  • Altitude min
    2,861 ft
  • Altitude start
    2,893 ft
  • Altitude end
    2,890 ft
  • Climb
    4,228 ft
  • Descent
    -4,229 ft
  • Grade max
    -52.7%
  • Grade min
    46.9%
  • Distance climb
    10 miles
  • Distance down
    9 miles
  • Distance flat
    3,934 ft

4 Reviews & Comments


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Details

  • Riding area
  • Primary Activity
    Mountain Bike
  • Difficulty rating
    Blue
  • Route Type
    Loop
  • Bike type
    AM, XC
  • Direction
    One Direction
  • Physical rating
    Hard
  • Activity Logs
    14
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Trail Conditions
  • Unknown
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  • Freeze/thaw Cycle
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    • Singletrack
    • Unpaved
    mtb
    4
    mtb
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    mtb
    87 | 1 comments
    mtb
    59

    Recent Trail Reports Along Route

    statustraildateconditiondescription
    Military Reserve Connection
    Sep 9, 2026 @ 9:08am (America/Boise)
    3 days
    Central Ridge Spur South
    Apr 28, 2026 @ 4:45pm (America/Boise)
    Apr 28, 2026
    Watchman Trail
    Apr 28, 2026 @ 4:45pm (America/Boise)
    Apr 28, 2026
    Hulls Ridge
    Mar 29, 2026 @ 10:29am (America/Boise)
    Mar 29, 2026
    Kestrel
    Mar 10, 2026 @ 4:41pm (America/Boise)
    Mar 10, 2026
    more reports »
    • By garrenm & contributors
    • #24853 - 832 views

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