Slim Creek FSR to Groundhog Lake
Deep Hart Ranges solitude above McBride.
Northeast of McBride in the Robson Valley, the Slim Creek Forest Service Road climbs out of the Fraser River bottomland and punches deep into the Hart Ranges. The route follows Slim Creek FSR before branching toward Groundhog Lake, gaining serious elevation through spruce-fir forest that gives way to open subalpine meadows. The road surface transitions from maintained gravel to rutted two-track as you push higher — expect mud wallows after any rainfall, aggressive off-camber sections near creek drainages, and at least two unbridged ford crossings of Slim Creek tributaries that require a proper read before committing. Moose are nearly guaranteed; the mountains behind the lake are stunning.
This is solidly a high-clearance 4WD route in dry conditions, but after rain it earns a difficult rating fast. A locker — front or rear — is strongly recommended, as is a recovery kit and a partner vehicle. Cell service disappears within the first few kilometres of the FSR. The McBride Robson Valley Forest District manages the road; conditions can be checked locally at the district office. Best season is mid-July through September once spring thaw drains out. Fuel in McBride before you leave — there’s nothing out here. Dispersed camping is permitted along the FSR corridor; the lake itself rewards with views into the Hart Ranges that few BC travellers ever see.
Trail Specs
| Difficulty | Difficult |
|---|---|
| Trail Type | Backcountry, High Clearance |
| Surface | Dirt, Gravel, Mixed |
| Features | Camping, Remote, Scenic, Water Crossings |
| Length (miles) | 38 mi / 61.2 km |
| Duration | 1-2 days |
| Max elevation (ft) | 5900 ft |
| Best season | July-September |
| Minimum vehicle | 4WD high-clearance, lockers recommended |
| Nearest town | McBride, BC |
| Land manager | BC Ministry of Forests — Robson Valley District |
| Permit required | No |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Start coordinates | |
| End coordinates | |
| Copy both for Google Maps directionsClick to copy the directions URL · or open it directly in a new tab | |
| Find on Google | Search on Google → |
Location
Trail Conditions
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Frequently asked questions
Can a stock Tacoma or 4Runner handle Slim Creek FSR to Groundhog Lake?
A stock Tacoma or 4Runner will struggle — lockers are strongly recommended, not just high clearance. The upper FSR sections get rutted and slippery, and you'll want locking differentials for the steeper muddy pitches near the alpine.
When does this trail actually open up, and what's the snow situation?
July through September is your window — snow lingers at elevation into early July most years, and fall rains can turn the FSR into a greasy mess by late September. Check with the Robson Valley District before heading out; the upper road can be impassable well after the lower sections look fine.
Do you need a permit to drive Slim Creek FSR or camp at Groundhog Lake?
No permit required — this is BC Ministry of Forests land under the Robson Valley District, so access and dispersed camping are free. Standard BC backcountry fire restrictions apply, so check the current fire ban status before you go.
What's the hardest section of this trail and what should I expect?
The upper FSR climb toward Groundhog Lake is where things get serious — steep, muddy, and loose, with little room to turn around if conditions are bad. The water crossings on the lower Slim Creek sections can also run fast and deep earlier in the season, so scout before you commit.
How far is it from McBride to fuel, and is there any cell service on this trail?
McBride is your last fuel stop — fill up there, no exceptions. There is zero cell service for the entire 61 km of this trail, so download offline maps, carry a sat communicator, and make sure someone knows your plan before you leave pavement.
Trail track
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