Somewhere near Plummer rents bikes as I've seen what appeared to be rental comfort bikes on the trail several times. It is also more likely that they come from Harrison, which has a bike shop. If I see any on Sunday when I'm there I'll ask the rider for the details. BTW Plummer is West and Mullan is East. The drive down the East side of Cd'A is quite scenic and Harrision would be a good place to park. You could then ride to Plummer first and get the hill out of the way return to Harrison, stop and get ice cream and then go all the way to Mullan.