Since this is the first year for this event, people have been curious what the course is like. The route is a big loop that uses county and forest roads in the Boise and Payette National Forests. Road surface varies, with a little pavement and a little bare dirt, but mostly well used gravel roads. There are three climbs (with corresponding descents, Yay!) followed by a section of rolling terrain next to Cascade Reservoir.
Here's a brief video preview of the course and terrain. There is a route map and elevation profile on the event's website. Should be a great ride!
https://www.youtube.com/watch?v=GI-wEewo1uA