I hiked Telescope Peak on June 3-4. Here are the details in case anyone is interested...
In my 2WD car with 5-6 inches of ground clearance, I got to Thorndike Campground without a problem (no bottoming out). I tried to go to Mahogany Flat, but the road seemed much more rutted and rocky than I cared to negotiate. Hiked from Thorndike to Mahogany--it was only 30 min.
Hiked from Mahogany to Arcane Meadows and camped. Next morning, tagged the summit (est. 60 degree temps there) and descended to my tent to pack up. There, I encountered the only other person on the mountain.
Still lots of snow up there, which is good if you're looking to melt it for drinking water. In a couple of places you need to cross patches of it, but no crampons or ice axes are needed.
Midday temps at the trailhead were about 80-85. If you want to go, do it soon because it's starting to get warm.