Course Map for SBMT: Double click on map to enlarge. Start/Finish and Transition Area are all at the Cascade Lake day use area.
The 15 mile bike leg begins from the transition area and heads to Doe Bay and back to transition area. The road is rolling hills and flat areas. There are some hills with a 4% grade and short hills with as much as a 14% grade. Near Doe Bay Resort there is a 45 degree turn which will require you to watch approach speed and transition.
There is also one small portion of road that is more narrow due to constructuction. It is clearly marked by the county. 
The turn around will be clearly marked.
The trail Run begins counter clockwise around Cascade Lake and includes the lagoon (don’t short your milage by crossing the lagoon bridge!) Finish at the transition/day use area.