Anvil Lake Trail System is a 4.2 mile lightly trafficked loop trail located near Eagle River, Wisconsin that features a lake and is rated as moderate. The trail is primarily used for hiking, trail running, and mountain biking and is best used from May until October.
Directions from Eagle River, WI: Take Hwy. 70 east about 10 miles to reach campground entrance.
Bring some birdseed if you're skiing in during the winter. The chickadees and squirrels will love you for it. There's a nice little hut where you can build a fire and make a day of it. I've biked this a few times in the summer (on a 650b) and it's exceptionally bumpy and rooted. I'm looking forward to trying it out this summer on a fat bike, which might make it a bit easier.
Pretty forest, nice variation in the trail.
Found it good for mountain biking with levels from easy to very difficult. Trails were marked and fairly well maintained. I was very surprised no one was biking it.
Awesome place for xcountry skiing and feeding the birds!