Per Wikipedia:

"Maligne Lake (mə-LEEN) is a lake in Jasper National Park, Alberta, Canada.

It is famed for the colour of its azure water, the surrounding peaks, the three glaciers visible from the lake, and Spirit Island, a frequently and very famously photographed islet.

The lake is located 44 km (27 mi) south of Jasper town, and is accessible by motor vehicle, including shuttle buses from Jasper.

Boat tours run to Spirit Island in the spring to autumn season.

The 44 km Skyline Trail, reportedly Jasper's most popular, highest and above treeline, multi-day hike, begins at Maligne Lake and finishes near the Jasper townsite.

Mary Schäffer Warren (1861 – 1939) was an American-Canadian naturalist, illustrator, photographer, and writer. She was known for her experiences in the Canadian Rockies in the early 20th century.

Warren was born Mary Townsend Sharples in 1861 in West Chester, Pennsylvania. She studied flower painting with George Cochran Lambdin.

In 1889 Sharples embarked on her first visit to the Canadian Rockies, accompanied by her fellow art student, Mary Vaux.

In 1890 she married Dr. Charles Schäffer, an amateur botanist, whom she had met the previous year at Glacier House, the Canadian Pacific Railway's hotel in the Selkirk Mountains.

The couple would spend summers and autumns traveling in the Canadian Rockies. Their winters were spent in Philadelphia. Charles Schäffer died in 1903, as did Mary's father and mother.

In 1904, Schäffer returned to the Canadian Rockies with her friend Mary "Mollie" Adams, determined to complete a botanical guide that her husband had started.

To complete this project Schäffer collected botanical specimens and learned the skill of photography. In 1907 'Alpine Flora of the Canadian Rocky Mountains' was published, with text by Stewardson Brown and drawings and photographs by Schäffer.

In 1912 Schäffer moved permanently to Banff, Alberta. In 1915 she married her longtime friend and mountain guide William "Billy" Warren.

Mary Schäffer Warren published articles about her explorations of the Rockies. Many have been collected in 'This Wild Spirit: Women in the Rocky Mountains of Canada'.

She died in 1939 in Banff."