CFD Alsask, Military radar station in Saskatchewan, Canada.

CFD Alsask was a military radar station in the Rural Municipality of Milton No. 292, just north of the hamlet of Alsask on the Alberta-Saskatchewan border. It consisted of three radar domes, housing, a school and a swimming pool, staffed by 125 military personnel and 60 civilians. Only one dome remains, a fibreglass dome on a four-storey steel tower with metal cladding.

RCAF Station Alsask opened in 1963 as a Pinetree Line radar site of NORAD, operated by 44 Radar Squadron with the call sign November, Jade Ring. It was renamed CFS Alsask when the Canadian military branches merged, and it was disbanded in 1987. The property passed to the village and joined the Rural Municipality of Milton No. 292 when the village was dissolved in 2009.

The location was home to a close community of military personnel and civilians who shared daily spaces and gathered regularly. The isolated prairie setting shaped everyday life and created a distinct bond among residents.

The site is managed by the Canadian Civil Defence Museum and offers guided tours to visitors. It is best to check ahead as access and tour availability may be limited.

The radar dome received heritage status in 2002 and preserves multiple operational levels with separate areas for command operations and signal processing. The different functional areas show how complex surveillance systems were organized at the time.