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
    85 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
  • 1 rides
  • 13 miles average
6 Months
  • 13 rides
  • 9 miles avg distance
All
  • 227 rides
  • Last: Sep 19, 2026
c1c2c3c4
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Status:
on Apr 13, 2026
Dry
Avg: 4.28 (16 votes)
Your vote: 0

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      Directions to lumpy-bumpy trailhead (40.944170, -74.759920)
      View on Discover Map

      Photos

      15 more »
      mtb
      315 |
      Aug 25, 2020 @ 4:41am
      Aug 25, 2020
      mtb
      253 |
      Aug 25, 2020 @ 4:41am
      Aug 25, 2020
      mtb
      324 |
      Aug 25, 2020 @ 4:33am
      Aug 25, 2020
      mtb
      317 |
      Aug 25, 2020 @ 4:26am
      Aug 25, 2020

      Videos

      5 more »
      Wavin Willy & Lumpy Bumpy II
      mtb
      3:00 | 28 | Apr 22, 2026 , Byram Township
      Wavin Willy & Lumpy Bumpy
      mtb
      3:00 | 32 | Apr 21, 2026 , Byram Township
      Trying to Rip the Gnar on Lumpy Bumpy
      mtb
      0:57 | 237 | Aug 24, 2022 , Byram Township
      Lumpy Bumpy
      mtb
      3:00 | 244 | Apr 8, 2022 , Byram Township

      Routes with this trail

      38
      Lumpy and Roly
      9 miles • 1,518 ft • 8 • Loop •
      Starting at Tranquility Lot, hits and Roly Poly
      67
      Test of Will: Allamuchy
      14 miles • 1,807 ft • 11 • Out & Back •
      Almost all of the good stuff
      66
      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.
      4.5 ★★★★★
      16 Ratings
      5 ★ 56%
      4 ★ 31%
      3 ★ 13%
      2 ★
      1 ★

      4 Reviews & Comments

      JakeSaltz JakeSaltz
      Super fun tech trail. Worth the ride to get out to it! Bravo to the folks who moved so much stone to get this to have flow! Can’t wait to go back and ride again.
      LiamU5272
      The top of this trail is a tech riders playground, literally. Ride around and explore, there are tons of slabs, spines, drops, and rolls to ride, some of which are not immediately obvious when following the markings.
      anchotequila
      Lots of leaves on the ground, hard to follow and markings aren't obvious when you're in the rocks, got a little confusing. Look forward to going back. The rock garden at the bottom is legit!

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      Nearby Trails

      Allamuchy Mountain State Park

      • By iridefatbikesTF Pro & contributors
      • #26721 - 5,276 views

      Frequently Asked Questions

      ▼ 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.
      ▼ How long is Lumpy Bumpy?
      Lumpy Bumpy is 4,780 ft long. The trail type is singletrack.
      ▼ Are dogs allowed on Lumpy Bumpy?
      Yes, dogs are allowed on Lumpy Bumpy. Please keep dogs on a leash where required and clean up after them.
      ▼ How do I access Lumpy Bumpy? Where is the closest parking trailhead?
      The closest parking and trailhead locations to Lumpy Bumpy are: View all parking locations in the area.
      ▼ How long does it take to ride Lumpy Bumpy?
      Based on recorded activities, it takes an average of 29 minutes to ride Lumpy Bumpy. The trail is 4,780 ft long. Actual times will vary based on fitness level, conditions, and pace. View recent activity logs for more details.
      ▼ How busy is Lumpy Bumpy?
      Lumpy Bumpy is a very popular trail. There have been 871 recorded activities on this trail. The trail has received 839 check-ins. View recent activity on this trail.

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