the Hiawatha is fun, but definatly NOT a mountain bike ride. It's a crushed gravel RR grade, down hill all the way. The features are very cool, tunnels and trestles... one tunnel is two miles long. Headlamps are required, as is a fee trail pass. It's great for families. If it's a hot summer day, go early as it gets very warm.
this trail is really in Idaho, not Montana.
Penny S