I always use my camelback. I took the bottle cages off my road bike. I just can't handle taking the bottle, drinking and replacing it in the cage. So when I use my camelback, I drink more.

As far as places to refil on the route, there are many picnic areas along the way, but I don't know if there are water fountains. Near the end there is a nice, clean public restroom, and I THINK there are drinking fountains, but I just can't be sure.

The turn-around spot is the Lodge at Pebble Beach. There are stores there. And at the 15 mile mark is a deli. You could buy bottled water. But Pebble Beach is "high rent district". Everything costs more in Pebble Beach!