Unmounted lantern slide of an unidentified mountain climber carrying a tripod. Possibly taken on the 1917 Mazamas outing to Mount Jefferson.

Unmounted lantern slide of an unidentified woman standing in the door of a U. S. Forest Service cabin at Pamelia Lake.

Unmounted lantern slide of the American flag and banners hung in Camp Hardesty, the Mazama base camp at Pamelia Lake during the 1917 annual outing to Mount Jefferson.

Unmounted lantern slide of Mazamas sitting on a log near Pamelia Lake during the 1917 outing to Mount Jefferson.

Unmounted lantern slide of an unidentified woman standing on a rock during the 1917 Mazamas annual outing to Mount Jefferson.

Unmounted lantern slide of an unidentified group of Mazamas on a lower snowfield on the south side of Mount Jefferson.

Unmounted lantern slide of a woman washing clothes in Pamelia Lake while others swim in the background on the 1917 Mazamas annual outing to Mount Jefferson.

Unmounted lantern slide of Mount Jefferson from the west.

Unmounted lantern slide of an unidentified man installing caulks or nails in a boot for the next day’s climb.

Unmounted lantern slide of unidentified Mazamas climbers in bathing suits standing on a log raft at Pamelia Lake.