Question: National Park Service Rustic log cabin overlooks which second-largest lake in Glacier National Park?

Context paragraphs:
Ford Creek Patrol Cabin: The Ford Creek Patrol Cabin in Glacier National Park was built in 1928.  The National Park Service Rustic log structure is a significant resource both architecturally and historically as a network of shelters, approx.  one day's travel apart, for patrolling backcountry rangers.

Moose Creek Ranger Cabin No. 19: Moose Creek Ranger Cabin No. 19, also known as Moose Creek Patrol Cabin and Moose Creek Shelter Cabin, is a log shelter in the National Park Service Rustic style in Denali National Park.  The cabin is part of a network of shelters for patrolling park rangers throughout the park.  It is a standard design by the National Park Service Branch of Plans and Designs and was built in 1935.  The cabin has five separate log dog kennels, also to a standard Park Service design, as well as an elevated food cache.

Saint Mary Ranger Station: The Saint Mary Ranger Station (or St. Mary) is a ranger station in Glacier National Park in the U.S. state of Montana.  The National Park Service Rustic log cabin was built in 1913 on the east side of the park overloooking Upper Saint Mary Lake.  It is one of the oldest administrative structures in the park.

Saint Mary Lake: Saint Mary Lake is the second-largest lake in Glacier National Park, in the U.S. state of Montana.

Upper Kintla Lake Patrol Cabin: The Upper Kintla Lake Patrol Cabin in Glacier National Park is a rustic backcountry log cabin.  Built in 1931 to standard National Park Service plan G913, the cabin has a single room.  The cabin was modeled after similar cabins used at Yellowstone National Park, which were in turn similar to those used by the U.S. Forest Service, which resembled trappers' cabins.  The Upper Kintla Lake Patrol Cabin is actually situated on the eastern shore of Kintla Lake which is almost 2 mi west of Upper Kintla Lake.

Kintla Lake Ranger Station: The Kintla Lake Ranger Station in Glacier National Park is a rustic log structure that was built by the Butte Oil Company in 1900 at Kintla Lake.  It was taken over by the National Park Service and used as a ranger station.  It is significant as a remnant of early oil exploration activities in the Glacier area.  A boathouse was built by the National Park Service in 1935 to the same design as the boathouses at Upper Lake McDonald and Saint Mary ranger stations.  A fire cache cabin, identical to those at Logging Creek, Polebridge and Lake McDonald ranger stations was built in 1934.

Kishenehn Ranger Station Historic District: The Kishenehn Ranger Station in Glacier National Park was built in 1919 to replace an earlier station that burned in 1913.  Located just three miles south of the Canada–United States border, the log cabin was one of the earliest administrative structures in the park.  The cabin was designed in an early version of what became the National Park Service Rustic style.

Entrance Station (Devils Tower National Monument): The Entrance Station at Devils Tower National Monument is a log cabin in the National Park Service Rustic style, built in 1941.  The cabin is based on 1933 plans created by the National Park Service Landscape Division for a now-vanished caretaker's cabin at Aspenglen Campground in Rocky Mountain National Park, adapted by NPS architect Howard W. Baker of the Branch of Plans and Design for dual use as an entrance station and as a residence.  It features a unique porch with rough-cut projecting log ends in a scooped pattern.

Lower Toklat River Ranger Cabin No. 18: The Lower Toklat Ranger Cabin No. 18, also known as the Lower Toklat Patrol Cabin, is a log shelter in the National Park Service Rustic style in Denali National Park.  The cabin is part of a network of shelters used by patrolling park rangers throughout the park.  It is a standard design by the National Park Service Branch of Plans and Designs and was built in 1931.  The cabin has twelve separate log dog kennels, also to a standard Park Service design.

Quartz Lake Patrol Cabin: The Quartz Lake Patrol Cabin in Glacier National Park is a significant resource both architecturally and historically as shelters, one-day's travel (8–12 miles) apart, for rangers patrolling the backcountry.  The National Park Service Rustic log cabin was built in 1930 by local builder Austin Weikert, using National Park Service standard plan G913.  The cabin is adjacent to the western shore of Quartz Lake.

Supporting paragraphs: Saint Mary Ranger Station Saint Mary Lake
Answer: Saint Mary Lake