The Birthday Crack is one of the better-known climbs at the Lake. It is a fun and challenging climb with a pretty sustained crack. Start out to the left of the Birthday Chimney (route 10) below the junction of a vertical and horizontal crack. Climb up the vertical crack into the pocket at the junction of the two cracks. Don't get yourself too far back into this pocket or you'll get stuck. Reach high (real high) with both hands and pull up on a juggy hold to get above the pocket. The top half of the climb is slightly easier with a nice sustained 20-foot crack to the top.