New Hampshire Code of Administrative Rules
Res - Commissioner, Department of Resources and Economic Development
Chapter Res 8500 - BUREAU TRAIL USE RULES
Part Res 8504 - ALL BUREAU ATV, UTV AND TRAIL BIKE TRAILS
Section Res 8504.02 - ATV, UTV and Trail Bike Trail Restrictions

(a) No person shall operate an OHRV other than an ATV, UTV, trail bike or snowmobile on any ATV and trail bike trail;

(b) No person shall operate a conventional motor vehicle on any ATV, UTV and trail bike trail unless the trail has been posted for that use. Trail restrictions shall be accomplished by posting signs that spell out the prohibited use, by public notification by authorized DRED personnel, or both, as appropriate;

(c) No person shall operate an ATV, UTV or trail bike on ATV and trail bike trails during the mud season;

(d) The Ammonoosuc Recreational, Rockingham Recreational, and Sugar River rail trails shall be exempt from (c) above;

(e) No person shall operate an ATV, UTV or trail bike off established trails;

(f) Notwithstanding the provisions of Res 8502.01(d) no person shall operate an ATV, UTV, or trail bike at a speed in excess of 35 mph on any ATV and trail bike trail. Trails may be posted for lower speed limits on bureau trails;

(g) Notwithstanding the provisions of (f) above, no person shall operate an ATV, UTV, or trail bike at a speed in excess of 25 mph on the Ammonoosuc Rail, Greenville Branch, Hillsborough Branch, Rockingham Recreational, Sugar River, Upper Coos or Presidential Recreational trails;

(h) No person shall operate an ATV, UTV or trail bike at a speed in excess of 10 mph within 250 feet of gates and stop signs;

(i) No person shall operate an ATV, UTV or trail bike between 1/2 hour after sunset and 1/2 hour before sunrise unless posted open for use, or permitted under a special use permit pursuant to Res 7403. Trail restrictions shall be accomplished by posting signs that spell out the prohibited use; and

(j) No person shall operate an OHRV wider than 50 inches, total width, on bureau trails except in Coos and Grafton Counties, as provided for in RSA 215-A:43.