Sumallo River Forest Service Road
Dewdney Trail through Cascade wilderness
The Sumallo River FSR runs parallel to the Coquihalla Highway but feels worlds apart, winding 28 kilometers through second-growth forest and riverside meadows. This well-maintained gravel road follows the historic Dewdney Trail route, crossing the Sumallo River multiple times on solid bridges while offering glimpses of the Cascade Range peaks that tower overhead. The road terminates at a spectacular viewpoint overlooking the Sumallo Grove, where ancient Douglas firs survived the logging era.
Most stock vehicles can handle this moderate route during the dry season, though high clearance helps with the rougher sections near river crossings. Spring runoff can wash out sections, so stick to July through October for the best conditions. No permits needed, but bring your own water and be prepared for limited cell service once you leave the highway corridor. Multiple camping spots along the river make this perfect for a weekend basecamp to explore the surrounding peaks.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Scenic Drive |
| Surface | Gravel |
| Features | Camping, Historic, Scenic, Water Crossings |
| Length (miles) | 17.4 mi / 28 km |
| Duration | Full day |
| Max elevation (ft) | 3100 ft |
| Best season | July-October |
| Minimum vehicle | High clearance 2WD |
| Nearest town | Hope, BC |
| Land manager | BC Ministry of Forests |
| Permit required | No |
| Cell service | Spotty |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Start coordinates | |
| End coordinates | |
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Location
Trail Conditions
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Frequently asked questions
Do I need 4WD or will a high-clearance 2WD truck handle the Sumallo River FSR?
High-clearance 2WD is the minimum and works fine in dry summer conditions — think stock Tacoma or older F-150 with decent ground clearance. If there's been recent rain and the gravel gets greasy, 4WD helps but isn't mandatory. Aired-down tires make a noticeable difference on the looser sections.
When does the Sumallo River FSR typically open and close for the season?
July through October is the reliable window. Snow can linger at the higher elevations into late June, and early fall storms can make the crossings sketchy by November. Check BC Forest Service road conditions before heading out — this area gets real weather fast.
Do I need a permit to drive the Sumallo River FSR or camp along it?
No permit required to drive the FSR — it's a public forest service road managed by BC Ministry of Forests. Dispersed camping is allowed without a reservation or fee, but follow Leave No Trace and check for any active fire bans before you go, especially in late summer.
What's the hardest part of the trail and what should I actually expect?
The water crossings are the crux — not technically brutal, but the Sumallo River crossings can run high and fast after rain or during snowmelt. At moderate difficulty the road itself is straightforward gravel, but a crossing that's knee-deep on a dry August day can be axle-deep in early July. Walk them before you drive them.
How far is the nearest gas station and is there cell service on the trail?
Hope, BC is your last fuel stop before heading in — don't count on anything once you leave the highway. Cell service is spotty at best and effectively nonexistent through most of the route, so download your maps offline and tell someone your plan before you roll.
Trail track
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