USFS National Forest System Trails · Mt. Baker-Snoqualmie National Forest · Washington · Updated October 2026
Middle Fork (USFS trail 1003) is a 13.7 mi trail in Mt. Baker-Snoqualmie National Forest, Washington. Mountain bikes are designated as allowed, Apr–Oct, with no Class 1 e-bike designation on record.
- Trail length
- 13.7 mi
- Grade-based difficulty
- Advancedgrade band +12-20%
- Surface
- Imported Compacted Material
- USFS trail class
- Class 41 primitive · 5 developed
Can I bike Middle Fork?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | Apr–Oct |
| Class 1 e-bike (pedal-assist, 20 mph) | Restricted | — |
| Class 2 e-bike (throttle, 20 mph) | Restricted | — |
| Class 3 e-bike (pedal-assist, 28 mph) | Restricted | — |
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
Middle Fork (USFS trail 1003) runs 13.7 mi through Mt. Baker-Snoqualmie National Forest in 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. Underfoot, the trail is recorded as imported compacted material. 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. Bike use is designated as allowed, typically Apr–Oct. The agency lists no Class 1, 2 or 3 e-bike designation here; absent a local order to the contrary, that means e-bikes are not an allowed use on this trail. 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. Because conditions, closures, and local orders change between data refreshes, confirm the current status with the managing ranger district before you ride.
Frequently asked questions
- Can you mountain bike on Middle Fork?
- Yes. Mountain bikes are designated as allowed on Middle Fork in Mt. Baker-Snoqualmie National Forest, typically Apr–Oct, per USFS data.
- Are e-bikes allowed on Middle Fork?
- No e-bike class (1, 2 or 3) is designated on Middle Fork in the USFS data.
- How long is Middle Fork?
- Middle Fork measures about 13.7 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Middle Fork?
- USFS data records the tread surface of Middle Fork as imported compacted material.
- How difficult is Middle Fork?
- 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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