more stats
4,780 ft
Distance
154 ft
Climb
-186 ft
Descent
00:30:46
Avg time
-32 ft
Altitude change
966 ft
Altitude min
1,073 ft
Altitude max
998 ft
Altitude start
968 ft
Altitude end
-0.7%
Grade
-28.3%
Grade max
21%
Grade min
1,729 ft
Distance climb
2,172 ft
Distance down
879 ft
Distance flat
00:30:46
Avg time

Lumpy Bumpy Details

  • Activities
    • Mountain Bike
    • Hike
    • Trail Running
  • Riding Area
    Allamuchy Mountain State Park
    Byram Township, New Jersey
  • Difficulty Rating
    Black Diamond Rate
  • Voted Difficulty
    Black Diamond (3 votes)
  • Local Popularity
    90 in Mountain Biking [+]
    • 5 in Trail Running
    • 5 in Hiking
  • Global Ranking
    #39960 in Mountain Biking [+]
    • #90855 in Trail Running
    • #68755 in Hiking
  • Hiking SAC Scale
    T2 Mountain Hiking
  • Trail Type
    Singletrack
  • Bike Type
    DH, AM, XC
  • Direction
    Downhill Primary
    Popular Direction Shown
  • Climb Difficulty
    Black Diamond
  • Physical Rating
    Hard
  • Trail Visibility
    Sometimes hard to follow
  • Dogs Allowed
    Yes
  • eBike Allowed
    No
  • TTFs on Trail
    Rock Face, Rock Garden
  • Land Owner
    NJ DEP

Steep terrain with lots of rock to climb and roll. The top is all exposed rock and features rollers, ramps, and rock spine riding. Taken in the usual direction, the end of the trail is all challenging rock gardens. Make-able, but difficult. This one will keep you on your toes and coming back for more.

Local Trail Association
Traditionally Indigenous Territory

Recent Activity on Trail

Past Week
  • 0 rides
  •  
6 Months
  • 8 rides
  • 9 miles avg distance
All
  • 221 rides
  • Last: May 31, 2026
c1c2c3c4
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Status:
on Apr 13, 2026
Dry
Avg: 4.28 (16 votes)
Your vote: 0

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Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Snow Cover Partial
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
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  • Downhill Primary
  • Both Directions
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BC Backroad Status

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Slope Aspect
Direction the slope faces
Flat N NE E SE S SW W NW
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        Directions to lumpy-bumpy trailhead (40.944170, -74.759920)

        Photos

        13 more »
        296 |
        Aug 25, 2020 @ 4:41am
        Aug 25, 2020
        233 |
        Aug 25, 2020 @ 4:41am
        Aug 25, 2020
        303 |
        Aug 25, 2020 @ 4:33am
        Aug 25, 2020
        304 |
        Aug 25, 2020 @ 4:26am
        Aug 25, 2020

        Videos

        5 more »
        Wavin Willy & Lumpy Bumpy II
        3:00 | 16 | Apr 22, 2026 , Byram Township
        Wavin Willy & Lumpy Bumpy
        3:00 | 21 | Apr 21, 2026 , Byram Township
        Trying to Rip the Gnar on Lumpy Bumpy
        0:57 | 235 | Aug 24, 2022 , Byram Township
        Lumpy Bumpy
        3:00 | 244 | Apr 8, 2022 , Byram Township

        Routes with this trail

        37
        Lumpy and Roly
        9 miles • 1,518 ft • 8 • Loop •
        Starting at Tranquility Lot, hits and Roly Poly
        64
        Test of Will: Allamuchy
        14 miles • 1,807 ft • 11 • Out & Back •
        Almost all of the good stuff
        63
        Test of Will Allamuchy
        15 miles • 1,935 ft • 11 •
        Gnar enabled! Learn more about how JORBA builds and maintains the trails you ride at jorba.org.

        4 Reviews & Comments


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        Nearby Trails

        Allamuchy Mountain State Park

        • By iridefatbikesTF Pro & contributors
        • #26721 - 5,069 views

        Frequently Asked Questions About Lumpy Bumpy

        ▼ Where is Lumpy Bumpy located?
        Lumpy Bumpy is located in Allamuchy Mountain State Park, Byram Township, New Jersey, United States. It is part of the Allamuchy Mountain State Park trail network. The trailhead is located at coordinates 40.94417, -74.75992.
        ▼ How hard is Lumpy Bumpy?
        Lumpy Bumpy is rated as Black Diamond difficulty. The physical rating is Hard. The average grade is 0.7%. The climb difficulty is rated Black Diamond.
        ▼ What is the elevation gain for Lumpy Bumpy?
        Lumpy Bumpy has 154 ft of elevation gain. The trail has 186 ft of elevation descent. The elevation ranges from 966 ft to 1,073 ft.
        ▼ Is Lumpy Bumpy a point to point trail?
        Lumpy Bumpy is not a point to point trail. The direction is Downhill Primary. The trail type is singletrack.

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