Ran from my hotel down Market street to Ferry Terminal. Along Embarcadero, past Fisherman's warf, past Fort Mason to Chrissy Green. Met up with Club Run San Franciso at 7:45AM. About 500 runners and about 10 pace groups with at least two pace group leaders per group (mostly training for the Nike SF Womens Marathon). Group stretching and left at 8:00 and ran through Presidio (hilly) and up to Golden Gate park, (more hills) and then left the group at their mile 6 and my mile 10. Back from Golden gate to my hotel (one big hill on same route in reverse as Bay to Breakers). Great views and challenging hills!