more stats
3,694 ft
Distance
31 ft
Climb
-27 ft
Descent
00:27:17
Avg time
3 ft
Altitude change
816 ft
Altitude min
848 ft
Altitude max
816 ft
Altitude start
820 ft
Altitude end
0.1%
Grade
-10.9%
Grade max
7.5%
Grade min
1,047 ft
Distance climb
732 ft
Distance down
1,913 ft
Distance flat
00:27:17
Avg time

Undermine Loop Details

  • Activities
    • Mountain Bike
    • Hike
    • Trail Running
  • Riding Area
    Coös Trails
    Gorham, New Hampshire
  • Difficulty Rating
    Green Rate
  • Local Popularity
    40 in Mountain Biking [+]
    • 100 in Trail Running
    • 55 in Hiking
  • Global Ranking
    #144584 in Mountain Biking [+]
    • #77423 in Trail Running
    • #41015 in Hiking
  • Trail Type
    Singletrack
  • Bike Type
    XC
  • Direction
    Both Directions
  • Climb Difficulty
    Green
  • Physical Rating
    Easy
  • Dogs Allowed
    Yes
  • eBike Allowed
    No
  • Year Opened
    2014

Short but sweet hand-built single track loop off of Hogan Road. Rolling and flowy this is a good beginner option. You can also use this to access the Mahoosuc Trail if you're heading up to Mascot Pond, about halfway through the loop you'll see a stream crossing over the trail toward the trail as it passes under the powerlines.

Access Info

After crossing the wooden bridge over the Power Canal, dip right into the woods to pick up the first section of Undermine Loop which traverses across the hill. Pop out on Hogan road under the powerlines and head right and downhill briefly until you rejoin the Undermine Loop singletrack on your left.

Local Trail Association
Traditionally Indigenous Territory

Recent Activity on Trail

Past Week
  • 1 rides
  • 11 miles average
6 Months
  • 10 rides
  • 6 miles avg distance
All
  • 41 rides
  • Last: Jun 16, 2026
c1c2c3c4
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Undermine Loop Trail Reports

statusdatedescription
Jun 16, 2026 @ 12:56pm (America/New_York)
Jun 16, 2026
Apr 29, 2026 @ 1:43pm (America/New_York)
Apr 29, 2026
 reporter Some spring mud here and there but overall good to go.
Dec 15, 2025 @ 9:47am (America/New_York)
Dec 15, 2025
 reporter
Apr 28, 2025 @ 6:12pm
Apr 28, 2025
Oct 9, 2020 @ 3:09am
Oct 9, 2020
 reporter
more »
Status:
on Jun 16, 2026
Ideal
no votes yet
Your vote: 0

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  • Snow Covered
  • Snow Cover Partial
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
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        Directions to undermine-loop trailhead (44.407250, -71.192840)

        Photos

        1 more »
        66 |
        Sep 17, 2019 @ 9:59am
        Sep 17, 2019

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        Frequently Asked Questions About Undermine Loop

        ▼ Where is Undermine Loop located?
        Undermine Loop is located in Coös Trails, Gorham, New Hampshire, United States. It is part of the Coös Trails trail network. The trailhead is located at coordinates 44.40725, -71.19284.
        ▼ How hard is Undermine Loop?
        Undermine Loop is rated as Green difficulty. The physical rating is Easy. The average grade is 0.1%. The climb difficulty is rated Green.
        ▼ What is the elevation gain for Undermine Loop?
        Undermine Loop has 31 ft of elevation gain. The trail has 27 ft of elevation descent. The elevation ranges from 816 ft to 848 ft.
        ▼ Is Undermine Loop a point to point trail?
        Undermine Loop is not a point to point trail. The direction is Both Directions. The trail type is singletrack.

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