Y Mountain is a mountain located directly east of Brigham Young University (BYU) in Provo, Utah, United States. The Slide Canyon, or Y Mountain Trail, leads to a large block Y located 1.06 miles (1.71 km) from a parking area at the mountain's base with an elevation gain of 1,074 feet (327 m). This hillside letter was built over a hundred years ago as the insignia for BYU. For years the trail to the Y has been one of the most hiked trails in Utah Valley and provides a scenic view of Provo and Orem, the rest of the many cities in Utah Valley and Utah Lake. The trail is also regularly used by hikers, bikers, paragliders and hunters to access the backcountry in the Slide Canyon area.

Brigham Young University (BYU) is a private research university in Provo, Utah, United States. It was founded in 1875 by religious leader Brigham Young and is sponsored by the Church of Jesus Christ of Latter-day Saints.