Big Bend

Casa Grande is the great blunt tower that stands over the mountain basin at the heart of the park. Its bulk is the harder, darker rock left behind when molten material cooled and the softer ground around it slowly wore away. For a sky-watcher, the basin beneath it is close to ideal. You are high enough to sit above the low desert haze, ringed by rock that walls off what little glow the distant towns throw, and open straight overhead. There is cool air here even when the desert below is still warm, and the dark comes early into the bowl as the surrounding peaks cut off the western sky. Come at dusk, watch the tower go from gold to grey to black, and stay put as the first stars find the gaps between the peaks.

The high shoulder of the range near Lost Mine Peak is one of the easiest ways to climb up out of the hot desert into cooler, darker air without a punishing hike. The peak itself is a rugged high point of the same old volcanic rock that forms the crest of the range. The trail onto its flank winds up through oak and juniper, where mountain birds like the soft blue-grey Mexican Jay work the slopes by day. By night the height pays off twice over: you sit above much of the haze that softens the low-desert sky, and the tall ridgeline screens the faint glow of the nearest settlements. Reach an open spot on the high ground before dusk, give your eyes time to settle into the dark, and the band of the galaxy seems to stand straight up out of the rock. Bring a jacket; the same height that clears the air also takes the day’s warmth away fast.

Nugent Mountain rises on its own near the road on the desert side of the range — a compact peak you can park close to and use as a marker in the dark. It suits anyone who wants the whole sky without walking far from the car. The flats around it are classic Chihuahuan desert: spindly ocotillo, low creosote bushes, and the stiff blades of lechuguilla, all of them short enough to leave the horizon clean and unbroken. With the peak as both a windbreak and a dark backdrop, it is an unfussy place to spread out, lie back, and let the sky slowly fill itself in. There is nothing to do here but wait for the dark to deepen, which is the entire point.

Grapevine Hills is a low jumble of rounded boulders out on the open desert north of the mountains, reached by a short, easy walk. By night the boulders become a field of dark shapes under an enormous sky, with nothing tall anywhere near to break the line of the horizon. The boulders are rounded like this because water and time work into every crack and wear the rock away from the outside in, leaving smooth backs and hollows that make natural seats and backrests for a long look up. Low and far from any light, the spot opens the sky nearly to the ground in every direction at once.

Panther Peak stands close to the small community at the park’s crossroads — the one cluster of buildings, and the one patch of electric light, for a long way in any direction. That makes it an unlikely but useful teacher. From a dark spot a little way off, you can see for yourself just how small a footprint the nearest lights make, and how quickly true dark reclaims the land beyond them. The peak and its rocky neighbors are the worn-down roots of the region’s fiery past — hard rock left standing as the softer ground around it washed away over long stretches of time. It is a place to measure the dark against the little light that dents it.

Tule Mountain sits above the desert on the park’s quiet western side, along the road that winds down toward the river. This corner faces away from the handful of towns off to the east, so its skies stay especially dark and undisturbed for a place you can reach without a hike. The ground underfoot is old sea-floor limestone and the pale gravel washed down off the heights, light enough to hold a little starlight. It is a place to watch the sky come all the way down to a low, far horizon in the direction of Mexico, where there is almost nothing on the land to light it from below.

Dagger Mountain marks the park’s remote northern reaches, out where the pavement gives way to long gravel roads and the map empties of names. That plain remoteness is the whole reason to come after dark. The peak rises over broad gravel flats built from everything the mountains have shed and washed downhill across the ages. There is little else out here — which is exactly the appeal. Come for the deepest, plainest dark in the park, the kind where the only light on the land is the light that falls out of the sky.

Cuesta Blanca — the white ridge — is a pale limestone rise on the open desert floor, its rock laid down as soft lime mud on the bed of a shallow sea long before the mountains ever burned their way up through it. That pale stone is worth seeking out at night for a simple reason. Light-colored limestone holds and throws back the faint light of the sky far better than dark ground does, so on a clear night around the new moon the ridge itself seems to glow softly while the desert around it stays flat black. It is a low, quiet place with a wide-open horizon and nothing built for miles in any direction — an easy walk for a long, unhurried look up.