Kinda. The main road to the back is a minimum maintenance road. However the trails are only ATV and ohm, not ORV. If you're looking for ORV trails to take a Jeep on, spider lake and iron range are northern MN, and Appleton is Western MN. There is also a new proposed border to border Jeep trail, that follows minimum maintenance roads and State Forest trails as well. It goes from saint Vincent to Grand Marais. Minnesota unfortunately doesn't have many off-road vehicle trails. They really limited themselves to ATV trails
Yes, there are a few trails open to ohvs. Nemadji has much more though.
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