Farmington Canyon is a good trail, just dirt and small rocks in the road. The hardest part of the trail is in Bountiful on the hillside where the B is, a couple small hills you gotta climb, but nothing a family sedan couldn't handle. Just beware of snow up there. I pulled a guy driving an Isuzu Rodeo out with my old Durango that was 3 wheeling off the side of the mountain because he "tried to go where the snow wasn't so deep." It wasn't "so deep" because it dropped off a couple feet.
Five mile pass between Eagle mountain and Tooele I have heard is a good place, but it can get rocky there. I took a trip to Moab in October before I moved back east, and there are tons of trails that a stock explorer can handle