On January 17, 2010 Evan Finnes and Peter Beacom hiked off trail into the Superior National Forest to investigate the rock formations around Tonic Lake.
The purpose of our visit was for Evan to investigate the origins of the rather circular depression surrounding the lake. I provided the 4×4 vehicle and Evan provided the fuel. Evan also brought a new pair of snow shoes and I did not. It was interesting to see the difference the snow shoes made. Evan was able to move through marshy lowlands twice as fast as me in my boots.
Tonic Lake lies north of Tomahawk Road and south of the Bounary Waters Canoe Area Wilderness. We drove north from Tomahawk road on a forest service road that recently had only seen use by snowmobiles. We parked along a fork in the road south of the lake and continued in on foot. We spent about three hours hiking up and down ridges, photographing rocks, and traversing a frozen marshland, until we eventually reached Tonic Lake.