Mount Allison, Mountain summit in Diablo Range, California, US

Mount Allison is a peak in the Diablo Range, southeast of Fremont, California. Its rounded summit is covered in short, dry grass and holds a 443-foot (135 m) lattice mast with three prongs at the top, erected on February 25, 1998, plus a shorter tower with round dishes and rectangular panels, a slender mast near a small dark building, and two thin masts behind. A wire fence runs along the lower slope.

The peak gained technical importance in 1998 when a broadcasting tower was installed to transmit Spanish television channels to regional audiences. This development marked the site's transformation into a major media transmission point.

The summit's antennas carry Univision on channel 14 (KDTV) and Telemundo on channel 48 (KSTS), both broadcast from the 443-foot mast erected on February 25, 1998. KTSF moved its transmitters here from San Bruno Mountain on May 7, 2018, and KTLN-TV and KAXT-CD followed from Mount Burdell on June 1, 2018.

Access involves crossing private property, with the main approach near Mission Peak parking area. Visitors should expect limited facilities and restricted access due to the broadcasting operations on site.

Though higher than the adjacent Mission Peak, this summit attracts far fewer visitors because broadcasting operations and private property restrictions limit public access. This makes it one of the overlooked peaks in an otherwise popular hiking area.