Here is an alternate that I've ridden several times, too. The route begins and ends in Bishop, but in July, riders would want to start from Bishop on the first day VERY early to do most of the first climb before the heat sets in. After that, the ride is at a pretty high altitude for much of the way, which keeps temps more reasonable. The climb to Monitor Pass on Hwy 89 can be hot, too, so an early start is recommended there, too. Most of this route has excellent shoulders and good services. It's also perhaps one of the most beautiful rides in the country. Keep in mind, however, that it is a good deal more challenging than the coastal ride you're talking about. Check out the elevation profile. I've typically done the ride in late May/early-mid June:
All the best!