The Thursday Rides are "decide & ride" rides. Those showing up choose where they wish to ride that day. Club Ride Policy applies to these rides. There no emails in advance of these rides or cue sheets. 

C Ride - Corralitos:

Meet at 9:45 am in front of the Corralitos Market for a moderately paced road ride of 25–35 miles with about 1,000' of elevation gain. Most Thursdays the ride winds up at Gizdich Ranch before heading back to Corralitos.

http://www.santacruzcycling.org/content.aspx?page_id=87&club_id=575722&item_id=479319