McDonald Observatory

The observatory owes its existence to William Johnson McDonald, a Paris, Texas banker who died in 1926 and left the bulk of his fortune to the University of Texas to build an astronomical observatory. It was an unexpected bequest from a man with no formal ties to astronomy, and it launched what became a world-class facility. The first great telescope was dedicated in 1939 on the peak now called Mount Locke.

Site testers chose the Davis Mountains for their height, their dry, clear air, and their distance from city lights. That last quality has only grown more precious. As cities elsewhere brightened the night, this corner of Texas stayed dark, and the observatory has become a leader in the fight to keep it that way, working with neighboring towns and Big Bend country to shield lighting and protect the sky as a shared resource.

The domes on the summit house instruments built across many decades. The Hobby-Eberly Telescope is among the largest optical telescopes in the world, its enormous mirror made of many hexagonal segments working together, and it is used to probe the most distant and ancient light in the universe, including the mystery of dark energy. Older telescopes on Mount Locke continue to do frontline research on stars, planets, and the makeup of the cosmos.

Daytime tours take visitors up the highest paved road in Texas to stand inside the domes and see these machines up close, dwarfed by mirrors and gears. It is a rare chance to look behind the curtain of modern astronomy, at the summit of a mountain, in a place built entirely to catch faint light from far away.

The observatory's most famous public offering is the star party, held on clear evenings at an outdoor amphitheater and telescope park below the summit. Astronomers guide the crowd through the constellations with a laser pointer, then set them loose among a battery of telescopes trained on planets, star clusters, nebulae, and distant galaxies. For many visitors it is the first time they truly see the night sky.

The reason it works so well is the darkness. The Big Bend region, including the observatory, has been recognized as one of the largest dark-sky reserves in the world, a rare pocket of true night. Away from the amphitheater lights, the sky fills edge to edge with stars, the Milky Way arching overhead, a sight that has grown scarce almost everywhere else.

The Davis Mountains are a sky island, a cool, wooded highland rising from the surrounding desert, and the wildlife reflects that. Mule deer, javelina, and the rare Montezuma quail move through the grasslands and oak, hummingbirds swarm the high country in season, and hawks and eagles ride the mountain winds. The elevation keeps summers cooler and the air clearer than the desert below.

Summer is the busiest season and brings warm days, though nights on the summit stay cool. It is also monsoon season, when afternoon clouds can build, so clear-sky planning matters. Fall and spring are mild and reliably clear, prized by both astronomers and visitors. Winter is cold and can be windy on the peaks, but the long nights and crisp, dry air make for some of the finest stargazing of the year.

The closest Boutel™ stays, so you can turn this stop into an overnight. Each is an independently owned, editorially selected place to stay.