The Phallus, Rock formation in Arches National Park, Utah, US

The Phallus is a 100-foot (30 m) sandstone pillar in Arches National Park, Grand County, Utah. It has a narrow shaft that tapers slightly and a rounded, bulbous top wider than its midsection. The rock is reddish-orange with horizontal striations and rises from reddish soil dotted with low grey-green shrubs, beside a paved road.

The Phallus is a sandstone pillar in Arches National Park, Grand County, Utah, standing about 100 feet (30 m) tall. Its name comes from its shape, and a climbing route for the formation has been published in guidebooks. The pillar is a freestanding remnant of layered sandstone, left standing while surrounding rock eroded away.

The name comes from the pillar's resemblance to a phallus, as recorded in the park's documentation. A climbing route on the formation has been published in guidebooks, which is how climbers refer to it. Visitors driving the park road use the 100-foot pillar as a landmark.

The Phallus stands beside a paved road in Arches National Park, so it can be seen and photographed from the roadside without a hike. The 100-foot pillar rises from a blocky sandstone base in dry, scrub-dotted ground.

The Phallus rises about 100 feet (30 m) and takes its name from its shape. A climbing route on the pillar has been published in guidebooks, so the tower is known to climbers as well as to drivers passing it in Arches National Park.