Here is the course of the FC 508
 

http://www.the508.com/route/stagerouteshow/index.html

35000 feet of climbing. Ouch!

Enjoy this course description.

ust north of Trona (mile 160) there is a 1000 foot climb up the Trona Bump (Mountain Section Four); the descent from there into the Panamint Valley is winding and may be fast with a tailwind. Some of the road ahead is very rough, but it used to much worse. At mile 200 you’ll begin the 13 mile, 3800 feet climb up Townes Pass (El 4956’) (Mountain Section Five). The climb up to 2000 feet is gentle, then there are steep grades of 10-13% to 4000 feet; the last few miles are gradual. It will be chilly at the top and you have a fast 17-mile, 5000 foot descent to Stovepipe Wells, where it may be hot! Desert rollers take you to Furnace Creek.

That is my neck of the woods. kind of( 2 hours away).

Trona is an UGLY place. I have driven that road and would not wish riding it on anyone.