Maybe it was a anomaly but there was tons of walking traffic in Yorba Linda and in Costa Mesa (by the soccer fields). I wasn't so much that there was a lot of foot traffic, but that they took up both lanes and wouldn't move in time..
[MENTION=243880]tunavic[/MENTION] - the SART in San Bernardino is pretty nice, not the most scenic but its a great 40 mile training loop.