Tried San Jacinto yesterday. Too snowy! It just wasn't fun so I turned around just before Little Round Valley. Someone I know went up the east side from the tram and made it but said it was still damn annoying. At least the waterfalls and creeks are going, and I got some purty pitchers.
It's worth mentioning that San Jacinto isn't one of the 70 state parks that's set to close this year - unless you help stop it.