Jeff Davis County

The county in brief

A traveler's read on Jeff Davis County

At Mount Locke 6,791 ft above sea level, McDonald Observatory operates the Hobby-Eberly Telescope (a 10.4-meter segmented-mirror instrument operated jointly by the University of Texas, Penn State, and Ludwig Maximilian University of Munich) — the highest professional astronomical observatory in the continental United States by site elevation per the International Astronomical Union site registry. The observatory is the centerpiece of the Greater Big Bend International Dark Sky Reserve, a 9-million-acre cross-border IDA-designated reserve (the world's largest by area, established 2022) that wraps Jeff Davis County, Brewster County, Presidio County, and the adjacent Mexican municipios of Manuel Benavides and Ocampo. Dark-sky compliance ordinances in Fort Davis, Marfa, Alpine, and the unincorporated county have been the model that Texas Parks and Wildlife now references statewide for outdoor-lighting design.

Davis Mountains State Park's Indian Lodge is a Civilian Conservation Corps adobe-construction historic hotel built 1933-37, the only remaining CCC-era state-park hotel still operating as guest lodging in Texas per the Texas Historical Commission's CCC-legacy inventory; the lodge's 39 rooms book 4-6 months out for any Star Party weekend. The state-park campground inside the same unit accepts rigs to 50 ft with full hookups, 27 sites on the Texas State Parks reservation system. Fort Davis (population 1,098, the county seat) sits at 5,050 ft and is the smallest Texas county seat by population — the entire county runs 1,996 people across 2,265 sq mi (less than 1 person per square mile, the second-lowest density in the state after Loving County). The Davis Mountains Star Party every spring (typically late April or early May) routes 600+ amateur astronomers and their rigs into the Prude Ranch private dark-sky site west of Fort Davis. Fort Davis National Historic Site preserves the most intact 19th-century US Army frontier-defense fort in the American West, with rangers in CCC-era reconstructed enlisted barracks running living-history demonstrations weekly.