No posted speed limits. Snowmobiles must be registered in home state. Nebraska Nebraska has 100 miles of groomed trails. Trail permits are not required. Snowmobiles do not need to be insured.
Helmets are mandatory for everyone.
County Roads only are open to ride. Same applies for road shoulders and ditches. No specified speed limit. There are 6,800 miles of groomed trails in New Hampshire. Trails permits are not required but registration is.