I hate descening in big groups. There are always some idiots trying to keep up with more skilled riders. The wobble all over the road and are a danger to both themselves and others. The road has some bumpy sections that are hard to see if you're in a group. Also, if you're turning right on to Portola Road, the turn is very sharp so the people in the front of the group will need to brake and the people in the back of the group need to be careful not to face-plant themselves or rear-end anyone else.