KOLD-TV (channel 13) is a television station in Tucson, Arizona, United States, affiliated with CBS. It is owned by Gray Television, which provides certain services to Fox affiliate KMSB (channel 11) and MyNetworkTV affiliate KTTU (channel 18) under a shared services agreement (SSA) with Tegna Inc. The three stations share studios on North Business Park Drive on the northwest side of Tucson (near the Casas Adobes neighborhood). KOLD-TV's primary transmitter is atop Mount Bigelow, with a secondary transmitter atop the Tucson Mountains west of the city to fill in gaps in coverage.