Here's a nasty little bugger that I started doing last year and should be accesible now though with the crazy weather we've had, snow at any time near French Meadows would be a serious possibility. The Corkscrew wall climb out of the Middle Fork is epic, climbing 2000ft (with a 100ft descent) in 3.2 miles. The 30 second descent leads you to 20% grade, not fun, though fortunately at that point it's somewhat shaded. That can be real important as the Middle Fork canyon is incredibly hot in summer with road temperatures frequently at 120 degrees. It can also be a pretty mosquito ridden in the morning (you are climbing Mosquito Ridge ) or gnatty in the afternoon. Yechh, you can't outrun them at 16% grade.
I forgot, this starts and ends in Auburn, Ca, it's 120 miles with 13,500 feet of climbing, 10k in less than 80 miles. If I ride it from my house, it adds another 30 miles and 1800 feet of climb.