This ride is a Star Chase.  

The 2+ group and the 3+ group ride the same route.  The 3+ group will not slow to wait for riders unable to maintain the 3+ pace.  Those folks will be picked up by the trailing 2+ group. This is an opportunity for any riders who want to try to ride the faster paced route, but who are not sure they can maintain that pace and don't want to hold the group back.  Riders lagging behind on the 3+* can simply fall back to be picked up by the trailing 2+* folks acting as a sweep group, leaving no one behind.

Click below for map/cues:

2+*/3+* Ride