The trail and river were great. Cass was interesting as was all of the trail. My main problem with the trail is the scattering of loose gravel on the trail, especially in dangerous areas near the river. It was also difficult because for most of the trail you follow two slim tracks about a foot wide. Add the loose gravel and horse hoof tracks left on the trail and it was hard to enjoy the spectacular view because you have to keep watching the trail. Great tunnels and bridges.