USFS National Forest System Trails · Mt. Baker-Snoqualmie National Forest · Washington · Updated October 2026
Grouse Butte Snowmobile 3620 (USFS trail 101.2) is a 2.8 mi trail in Mt. Baker-Snoqualmie National Forest, Washington. Mountain-bike use here is not designated in USFS data, with Class 1 e-bikes also designated.
- Trail length
- 2.8 mi
- Grade-based difficulty
- Advancedgrade band +12-20%
- Surface
- Snow
- USFS trail class
- Class 41 primitive · 5 developed
Can I bike Grouse Butte Snowmobile 3620?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Not designated | — |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | year-round |
| Class 2 e-bike (throttle, 20 mph) | Allowed | year-round |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | year-round |
Zooming out: across Mt. Baker-Snoqualmie National Forest, 74% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
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About this trail
Grouse Butte Snowmobile 3620 (USFS trail 101.2) is a 2.8 mi trail in Mt. Baker-Snoqualmie National Forest, Washington. This profile summarizes what the official US Forest Service trail record says about riding it: how long the trail is, what it's built on, how steep the route grades out, and which forms of bike use the agency has designated. The tread is mapped as snow. Its grade-based difficulty is Advanced (grade band +12-20%) — a steep steepness profile derived from USFS slope data, not a technical mountain-bike rating. For traditional mountain bikes, use is not designated according to USFS data. On the electric side, Class 1, Class 2, Class 3 e-bikes are also designated — Class 1 being pedal-assist only, Classes 2 and 3 adding a throttle and higher assisted speed. The route is mapped as USFS Trail Class 4 on the agency's 1-to-5 development scale, where 1 is the most primitive, minimally maintained tread and 5 is the most developed. For day-of certainty on closures or seasonal orders, check directly with the ranger district, since this reflects the USFS data as of the latest refresh.
Frequently asked questions
- Can you mountain bike on Grouse Butte Snowmobile 3620?
- Mountain-bike use on Grouse Butte Snowmobile 3620 is not designated in USFS records, though Class 1 e-bike use is designated. Confirm current rules with the managing ranger district.
- Are e-bikes allowed on Grouse Butte Snowmobile 3620?
- Class 1, Class 2, Class 3 e-bikes are designated on Grouse Butte Snowmobile 3620 in the USFS data.
- How long is Grouse Butte Snowmobile 3620?
- Grouse Butte Snowmobile 3620 measures about 2.8 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Grouse Butte Snowmobile 3620?
- USFS data records the tread surface of Grouse Butte Snowmobile 3620 as snow.
- How difficult is Grouse Butte Snowmobile 3620?
- Its grade-based difficulty is Advanced (grade band +12-20%), derived from USFS slope data. This reflects steepness, not technical mountain-bike difficulty.
How we read this data
Grade-based difficulty above is the USFS grade (route steepness), not a technical mountain-bike rating — a gentle-grade trail can still be rocky or technical, and vice versa. Bike and e-bike status come verbatim from the USFS managed-use fields for this trail; we never infer access we can't cite. See our methodology for how the dataset is built and what each field means.
Where it is
Approximate location of Mt. Baker-Snoqualmie National Forest (USFS trail geometry isn't mapped).
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