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4,898 ft
Distance
61 ft
Climb
-90 ft
Descent
00:05:46
Avg time
-29 ft
Altitude change
102 ft
Altitude min
137 ft
Altitude max
137 ft
Altitude start
108 ft
Altitude end
-0.6%
Grade
-11.7%
Grade max
12.2%
Grade min
1,168 ft
Distance climb
1,677 ft
Distance down
2,008 ft
Distance flat
00:05:46
Avg time
Glass Details
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Activities
- Mountain Bike
- Hike
- Trail Running
-
Riding AreaAllaire State Park
Howell, New Jersey -
Difficulty Rating
-
Local Popularity100 in Mountain Biking [+]
- 85 in Trail Running
- 100 in Hiking
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Global Ranking
-
State Ranking
-
Trail TypeSingletrack
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DirectionBoth Directions
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Dogs AllowedYes
This trail is so named due to the old glass dump from a farm from long ago. This 1 mile trail is very fun with it's gradual ups and downs and its many twists.
Access Info
Located off the main fire road and connects to the unimproved road near the airfield.
Local Trail Association
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Please consider joining or donating to the local trail association to supportDonate to earn trail karma!
trail development & maintenance.
Traditionally Indigenous Territory
Recent Activity on Trail
Past Week
- 13 rides
- 15 miles average
6 Months
- 372 rides
- 11 miles avg distance
All
- 4,105 rides
- Last: Nov 5, 2026
| c1 | c2 | c3 | c4 |
|---|---|---|---|
January | February | March | April |
May | June | July | August |
September | October | November | December |
Glass Trail Reports
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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
Trail Flow (Ridden Direction)
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The colour categories are based on what percentage of users are riding a trail in its intended direction.
The colour categories are based on what percentage of users are riding a trail in its intended direction.
- > 96%
- > 90%
- > 80%
- > 70%
- > 50%
- < 50%
- bi-directional trail
- no data
Trail Last Used
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- < 2 days
- < 1 week
- < 2 weeks
- < 1 month
- < 6 months
- > 6 months
Trail Ridden Direction
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- Downhill Primary
- Both Directions
- Uphill Primary
- Uphill Only
- One Direction
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Trail Popularity ?
Trailforks scans activity logs to determine which trails are ridden the most in the last 9 months.
Trails are compared with nearby trails in the same city region with a possible 25 colour shades.
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Trails are colored based on popularity. The more popular a trail is, the more red. Less popular trails trend towards green.
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BC Backroad Status
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Slope Aspect
Direction the slope faces
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Directions to glass trailhead
(40.145820, -74.135380)
Photos
7 more »
Videos
1 more »
Routes with this trail
★ 2.4 • 9 miles • 392 ft • 9 •
2 downhill runs, Galss and Steelman into some tight singletrack alongside the river and into Sherwood then...
★ 4.0 • 6 miles • 185 ft • 28 • Loop •
Nice Leg burner to get the legs ready for the backside of the Allaire
14 miles • 675 ft • 16 • Loop •
This route covers all ends of the entire park and loops back near the start around mile 8 if you want to...
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