It's Sierra, not Sierras. The root spanish word is plural already. Are you going to do any climbing, or just simulate a pad person?
Okay wiseguy, if you want to be technical, it would be, "I am looking up at the Sierra Nevada", not "Sierra's", not "Sierras", not "The Sierra"...etc. I knew all that, I was just being lazy.
Just bouldering for a couple days and possibly climbing in the Gorge(is that plural?) if my partner for Wednesday pans out.
P.S. I am a simulated pad, not a simulated "pad person".