Red Rock Canyon State Park is a nice place to stop along Highway 14 if you're headed up to the Easter Sierra.  There are a few hiking trails here that meander through the dramatic Red Cliffs.  If you're into geology, this is a place you'll want to stop!  I wish we could have explored the area, but it was over 100 degrees.  It was a nice, scenic place to stop, get out of the car and stretch our legs before heading up the 395.  There are also some vault toilets here as well.