Klyuchi is an air base in Kamchatka Krai, Russia located southwest of the settlement of Klyuchi. It is a small but significant interceptor airfield covering northern Kamchatka, probably to defend international borders during nearby missile testing operations at Kura Test Range 130 km to the northeast. Klyuchi contains about twelve fighter revetments and some narrow tarmac space. It is an active military base; Google high-res imagery shows some An-24 and other transports, along with helicopters.
An OSAE (Independent Composite Aviation Squadron) with An-26 aircraft is or was based at Klyuchi. The airfield may have reverted to some civilian use since the Cold War.