KSIZ (102.3 FM) is a radio station based in Mount Shasta, California (city of license is Weed, California), owned by Mark & Cynthia Kay Baird's Buffalo Broadcasting, LLC, which also owns KSYC-FM in Yreka. KSIZ broadcasts to the Siskiyou County and Redding markets, and has one of the largest geographical reaches of any FM station Northern California. The program director/on-air talent is Joe Kesterson, who also hosts the evening show on KSYC show. Kesterson replaces Rick Martin, former station owner/general manager/on-air talent, who had been on the air in the market for 20 straight years, longer than any other local personality.
The station hit the air once again under the classic rock format in January 2013 with the slogan "Sizzlin' Classic Rock".