The Air Base Alpnach is a Swiss Air Force airfield near the town Alpnach in Canton of Obwalden in Switzerland. It has a concrete runway with a length of 1500m and a width of 40m, as well as several taxiways and hangars.HistoryAs early as 1929 there was a landing site Alpnach. From 1939 it expanded, first to a landing-place of 850x. 1940 produced two wooden hangars and in September 1942 made by the initial military occupation of the place by the Flying Section 7, which can be regarded as the official start of the airfield.The first concrete runway was built in 1943 between the Eichistrasse and Lake Alpnach. It had a length of 875m. Furthermore, eight type U-43 aircraft shelters and bunkers for command and ammunition were built.As part of the Swiss Reduitstrategie were from 1952 Aircraft cavern built into the rock of the adjacent Mueterschwanderbergs, which also (on the Nidwaldner side) the former Mueterschwanderberg artillery fortress is. 1960, the final cavern facility was officially handed over to the Directorate of Military airfields. Since 1958, operated Venom jets DH-112 from Alpnach. In 1973, the change to Hawker Hunter was made and in 1979 there was a further change to the F-5 "Tiger". Because of the Army XXI reform flight operations from the caverns were terminated.There have been several extensions of the runway: 1952 to 1500 meters, and finally in 1959 at 1950 meters.