Birchwater Airport (ICAO: AK85) is a small private general aviation airstrip located in Wasilla, Alaska, United States. It serves private and recreational pilots in the Mat-Su Valley region, a common area for light aircraft operations given Alaska's vast wilderness and limited road infrastructure. The airport is not served by commercial airlines and does not feature passenger terminals or scheduled service. Like many small Alaskan airstrips, it primarily supports bush flying, personal aviation, and local access to remote areas. Wasilla is situated roughly 45 miles north of Anchorage, and the surrounding region hosts numerous small airfields reflecting Alaska's heavy reliance on general aviation for transportation and recreation.