Nicolet National Forest Anvil Lake Technical Loop
Granite boulder technical challenge
The Anvil Lake Technical Loop earned its reputation the hard way, threading through house-sized granite boulders left by retreating glaciers 10,000 years ago. Starting near Anvil Lake Campground, the route immediately climbs through what locals call the ‘Rock Garden’ — a mile-long obstacle course of granite slabs and tight squeezes that’ll test your spotter’s patience and your truck’s armor. The trail follows old copper mining roads from the 1880s, passing the collapsed shaft of the Anvil Mine before dropping into a technical descent known as ‘Pinball Alley’ where trees grow uncomfortably close to the trail.
This is expert-level wheeling that demands rock sliders, skid plates, and a solid understanding of line choice. Summer conditions are best, though even then expect body damage if you’re not careful. The loop connects to Forest Road 2178 for an easier exit if things get too spicy. No permits required, but the Anvil Lake Campground makes a good base camp for multiple attempts. Eagle River is 15 minutes away for repairs and cold beer. The granite challenges here rival anything in the Southwest, just with more trees trying to grab your mirrors.
Trail Specs
| Difficulty | Expert |
|---|---|
| Trail Type | Technical 4x4 |
| Surface | Rock |
| Features | Camping, Historic |
| Length (miles) | 8 mi / 13 km |
| Duration | Half day |
| Max elevation (ft) | 1780 ft |
| Best season | June-September |
| Minimum vehicle | Modified 4WD with armor |
| Nearest town | Eagle River, Wisconsin |
| Land manager | USDA Forest Service |
| Permit required | No |
| Cell service | Spotty |
| Water crossings | No |
| Dispersed camping | Yes |
| Start coordinates | |
| End coordinates | |
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Location
Trail Conditions
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Frequently asked questions
Can a stock Jeep Wrangler handle the Anvil Lake Technical Loop?
No, this trail requires modified 4WD with skid plates, rock sliders, and upgraded suspension. Stock vehicles will take body damage on the granite boulder sections.
Is the trail accessible in spring or late fall?
Best access is June through September when snow is clear and ground conditions are stable. Spring mud and fall leaf cover make the technical granite sections extremely dangerous.
Do I need permits to run this trail in Nicolet National Forest?
No permits required, but you must stay on designated forest roads. The trail is free to use but camping requires following Forest Service dispersed camping regulations.
What's the hardest obstacle on this technical loop?
The granite boulder field climb midway through the loop requires precise wheel placement and potentially winching. Expect multiple spotting attempts and possible body contact with rocks.
How far can I get from Eagle River without cell service for emergencies?
Cell service becomes spotty within 2 miles of the trailhead and is essentially non-existent on most of the 8-mile loop. Bring satellite communication for emergencies.