The MT1000 will start at the Darby MT Loggers Day fairground.
The location is here. lat 46.016873, lon -114.177637
The Darby Loggers Day festival will be starting earlier in the same weekend as the MT1000. We have arranged for special reserved parking and camping along the south fence during Loggers Days, and where you may leave your vehicle while on the MT1000. You may arrive as early as 3:00pm Thursday afternoon, July 14th to enjoy Darby and loggers Days. You may be required to pay the normal Loggers Day entry fee to watch the competitions, but the parking and camping is free.
The other camping spots near the river mentioned on their web site might be better than camping in the fairgrounds that weekend; you might want to check it out.