Mark McAuliffe in his element on the Appalachian Trail on Spaulding Mountain.

Chris O'Neil and Mark McAuliffe pause along the Appalachian Trail in the 100-Mile Wilderness.

Maine Trail Crew members use a griphoist system to move large stones into place as part of Appalachian Trail maintenance work during the summer.

Maine Trail Crew members use a griphoist system to move large stones into place as part of Appalachian Trail maintenance work during the summer.

Maine Trail Crew members work together to move stone steps into place on the Appalachian Trail during the summer.

Chris O'Neil and Mark McAuliffe pose atop North Crocker Mountain on the Appalachian Trail.

Mark McAuliffe, left, and Joe Kilbride pose on the Appalachian Trail atop Saddleback Mountain.

Mark McAuliffe.

Mark McAuliffe.

Mark McAuliffe.

Hearty hikers, from left, Carey Kish, Chris O'Neil, Joe Kilbride, Mark McAuliffe enjoy some time on Little Bigelow Mountain.