When plans to hold the annual summer camp in Tweedsmuir Provincial Park fell through, some of us decided to do a backpacking trip to the area following the first week of camp. Eight of us came from the camp and were joined by four others, and on July 30 we hiked in on the Rainbow Range trail from Heckman Pass and spent four nights camped by a large lake variously known as McCauley Lake, M Lake, or Groundhog Lake.