Q: We’re going camping at the Fishing Bridge campground in Yellowstone National Park and I would like to bike with my 6-year-old son. How can I find the bike trails? Will the trails be rugged? What kind of tires should I put on his bike?A: I contacted Yellowstone and they said that there is a biking trail relatively close to the Fishing Bridge Campground called the Natural Bridge Trail. It starts near the Bridge Bay Marina. It’s recommended that you use mountain bike tires on this trail.In addition, it’s important to note that there are no bicycle trails adjacent to park roads, and riding on the main roadway is not considered safe for a child. Bicycles are not allowed on any park hiking trails or in off-road backcountry areas,either.Bicycle riders on public roadways in Yellowstone must obey the same rules and regulations that apply to motorized vehicles. Bikes must also have a white light on the front and a red light or reflector on the rear during periods of low visibility.