KTHO (590 kHz) is a commercial AM radio station broadcasting a classic rock radio format. Licensed to South Lake Tahoe, California, it serves the Lake Tahoe Basin- Reno–Sparks metropolitan area. It also simulcasts on South Lake Tahoe-based FM translatorK241BK at 96.1 MHz.
The station is owned by International Aerospace Solutions, Inc., a company owned by long-time Southern California broadcaster Darrell Wampler, using the slogan "Local Talk and Classic Rock." Network news is supplied from ABC News Radio.
After he took over operations of KTHO, Wampler retained current KTHO operations manager Ed Crook and employed local Lake Tahoe radio personalities Paul Middlebrook as a media consultant (and essentially general manager), semi-retired Bill Kingman as a technical advisor and broadcaster, and Curtis Fong as on-air personality. Wampler is also heard on the station under his radio air name, "The Insane Darrell Wayne".
The station first signed on the air on March 17, 1963, broadcasting middle of the road music and local news. On April 12, 1966, a sister station signed on at 103.1 FM (today 102.9 KWYL). On or about March 12, 2009, KTHO changed its format to classic rock, using the identification "590 K-Tahoe."