The Great Depression in Canada hit Alsask hard, and the village struggled with maintaining its population.

[10] Things began to change; in 1959 with the establishment of Royal Canadian Air Force Station Alsask, a 169 ha (418 acres) base was established next to the town site, and by the early 1970s the population had reached over 800, though the village never reverted to town status.

[11] Since the closure of the RCAF Station Alsask, the village population continued to decline; by 2009, the Village of Alsask was dissolved as a political entity, and a motion was accepted to join the Rural Municipality of Milton as a special service area on July 30, 2009.

[13] The site is the former Royal Canadian Air Force Alsask Station, a Cold War era, military base and Pinetree Line radar dome,[14] open to public only a handful of days per year for guided tours operated by the Canadian Civil Defense Museum.Military Heritage Site - Google Maps Few of the original buildings remain.

The site also includes a bowling alley built to entertain families of the RCAF and Alsask and area residents.

There is a weather station located about 11 km (6.8 mi) southeast of the community, adjacent to Alsask Lake.