Biking -- Bikes are restricted to established roads, bike routes, and parking areas, and are not allowed on trails. Restrictions apply to the most hazardous portions of Going-to-the-Sun Road during peak travel times, from around mid-June to Labor Day; call ahead or check the website to find out when the road will be closed to bikers. During low-visibility periods of fog or darkness, a white front light and a red back reflector are required.
Boating -- Although boating is permitted on some of Glacier's lakes, motor size is restricted to 10 horsepower on Bowman and Two Medicine lakes. A detailed list of other regulations is available at park headquarters and staffed ranger stations. Park rangers may inspect or board any boat to determine regulation compliance.
Fishing -- A fishing license is not required within the park's boundaries; however, there are guidelines, so check with rangers at visitor centers or ranger stations for regulations. Also keep in mind that the eastern boundary of the park abuts the Blackfeet Indian Reservation, so you may find yourself fishing in their territorial waters. To avoid a problem, purchase a $10 daily use permit from businesses in the gateway towns; the permit covers fishing, hiking, and biking in the reservation. Fishing outside the park in Montana waters requires a state license; check in at a local fishing shop to make certain you're within the law.
Horses -- Although visitors may bring their own horses and pack animals into the park, restrictions apply to private stock. A free brochure detailing regulations regarding horseback riding is available from the Park Service.
Vehicles -- RVs and vehicles longer than 21 feet or wider than 8 feet are prohibited on the 24-mile stretch of Going-to-the-Sun Road between Avalanche Campground and Sun Point on St. Mary Lake; vehicles over 10 feet are discouraged. Snowmobiling is prohibited in the park.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.