How far are you from the "Trail of the Couer d Alenes"? It's 74 miles, mostly flat. There are small towns along the way where you can get food and water. You can ride 50 miles out then ride back.

Organized centuries have designated sag stops where food and water is available. There are other riders so you have companionship. There is sag service available in case you break down on the road or for some reason can't finish the ride.