The Fremont Cannon is the trophy awarded to the winner of the Battle for Nevada (also known as the Nevada–UNLV football rivalry), an American college football rivalry game played annually by the Nevada Wolf Pack football team of the University of Nevada, Reno (Nevada) and the UNLV Rebels football team of the University of Nevada, Las Vegas (UNLV). The trophy was built in 1970 and is a replica of a 19th-century Howitzer cannon that accompanied American explorer and politician John C. Frémont on an expedition to the American West and Nevada in the mid 19th century. The original cannon had been abandoned, due to heavy snows, in the Sierra Nevada in 1843. The replica cannon was originally fired following a touchdown by the team in possession of the cannon, but it has been inoperable since 1999. The wooden carriage is painted the school color of the team in possession, navy blue for Nevada or scarlet for UNLV. The trophy is the heaviest and most expensive in college football. Since 2012, the game is also part of the Silver State Series (formerly Governor's Series), the series of athletic competitions between the two schools.

The first game between the teams was in 1969 with Nevada defeating UNLV. The following year, the cannon was built and UNLV became the first team to win the cannon. Nevada has the longest win streak in the rivalry, having held the cannon for eight consecutive years.

UNLV is the current holder of the trophy after defeating Nevada on November 26, 2022, at Allegiant Stadium.