Shoreline MTB

I forgot to post it, but about 2 months ago, I went mountain biking with 4 guys from work. 2 of them are really good (1 had a single speed, which you have to be pretty hardcore to take on these trails and climbs). We went on the Shorline trail, north of the other trail I went on (the Drake posting). The ride again started with a 500 ft climb which again killed me. Once up top, the going was pretty fun, but I didn't have much energy from the climb. In fact, I decided to not finish the ride because I wasn't feeling so hot, so one of my friends rode back to his car and came and picked me up. Not the best way to impress the coworkers the first ride out.