I'm going to name this race after the 48 bus route. It would basically run from one end of the route to the other. The run itself would not follow the route it would just start and end at either end of the 48. I ran about half of it yesterday as shown below on the map (19.3 miles). The Ultra 48 would reverse this course and continue on via the burke gilman all the way to Golden Gardens. The course would begin with a loop at Seward Park and run north along Lake Washington, running through the Arboretum, across the Foster Island Trail through UW's Union Bay Trail and Natural Area, up to the Burke Gilman out to the Fremont bridge and across, then hitting the trail and walking path through SPU, then across 15th St W to the locks, across the locks and then hitting the last section of the Burke to Golden Gardens. Or something like that.