If you like taking dips in fresh, natural, chemical-free water then Flagstaff lakes are where you need to be in summer. There are numerous lakes and creeks around Flagstaff. Test your fishing skills at these popular fishing lakes: Ashurt Lake, Upper Lake Mary, Mormon Lake, and Kinnikinick Lake. Go canoeing, kayaking, or SUPing on Soldier, Long, or Knoll Lakes. Or plan a rafting trip on the Colorado or Verde Rivers.