Tamarancho Flow Trail Party - if you live in the Bay Area you should show up
These days, I only take single speed 29er to Tamarancho
Many locals also use rigid, I use FOX Fork as my body is getting thrashed. If you are set up 29er, 32 x 20 is perfect. Figure 2 or 3 hours to do both loops at casual pace, meeting a few people, eat snack, session a few jumps(not many, but good ones) etc (Strava if you need to see fast times).