I spent last weekend in Mammoth Lakes, CA and intended to do some riding. I loaded my bike and all of my gear into the truck, and that's where it stayed for the length of the trip. Two things caught me short - the altitude and the hills. I fully expected both, but wasn't ready for just how much they would whoop me. I had a hard enough time hiking around and don't want to think about what would have happened if I'd tried to ride anywhere.
Below is a shot of McLeod Lake, a short hike from where I stayed. I also tromped around Convict Lake and a bit in Yosemite. This is will certainly go on my list of trips to repeat, especially in the spring/summer/fall while 120 through Tioga Pass is open.