I think the limit on my gravel bike is no switchbacks. And no rock gardens either. But there is one, mostly singletrack, trail near me that takes me about an hour to do on my gravel bike and about 20 minutes on my mountain bike. It's too bad, because it would cut the distance out to the state forest down by a lot, and I wouldn't have to ride on the big road out of town. Granted, the big road out of town has 10' wide shoulders, but it's closed for crashes a couple of times a month. It happens so often the fire department has pre-printed signs that say "Route 322 closed"
