You searched for: Place Grattan Twp., ca. 3 mi. east of Cannonsburg on 6 Mile Rd., and ½ mi. north on gravel road/driveway. Saul Lake Bog Preserve on Saul Lake. Remove constraint Place: Grattan Twp., ca. 3 mi. east of Cannonsburg on 6 Mile Rd., and ½ mi. north on gravel road/driveway. Saul Lake Bog Preserve on Saul Lake.