Dinsmore Airport , formerly Q25, is a public airport located east of Dinsmore, serving Humboldt County, California.. The airport is mostly used for general aviation. Facilities Dinsmore Airport covers and has one runway, by long with an asphalt surface. Use One aircraft and one ultralight are based at the field, an average of 31 operations per week with 62% transient and 38% local general aviation operations in the year before 31 December 2011. References External links Topographic Map & Description Airports in Humboldt County, California