I'm riding from Dudley's in Santa Ysabel through Mesa Grande to Palomar Observatory and back on Saturday.
It's about 71 miles and about 7-8,000 feet of total climbing. I enjoy the South Grade more than the East, but that's open to the whims of anyone who shows.
(Here's a map for anyone considering.)
Sound off if interested, and let me know what time you can get there. I think 8ish or earlier would be best, so we don't get murdered by the heat, but can wait.