|Broadcast area||Madison, Wisconsin|
|Branding||FM 100.5 ESPN|
|Frequency||100.5 MHz FM|
|Callsign meaning||From the station's previous hot TaLk format, "100 X"|
|Former callsigns||WWAM (1989-1990)
|Owner||Good Karma Broadcasting, LLC|
|Sister stations||WTTN, WWHG, WBEV, WXRO, WAUK, WRRD|
The station began with an Adult Contemporary format as WYKY, "Key 100.5", then for several years aired a "hot talk" format as "100X," with a schedule including the Howard Stern and Don & Mike shows and sports programming from Sporting News Radio and later Fox Sports Radio. By the mid-2000s, the station would morph into an all-sports format, with both national and Wisconsin-based programming. WTLX would take affiliation with ESPN Radio, whose programming had been airing in Madison on rival station WTSO, on January 1, 2009. Along with that affiliation change, WTLX's transmitter and city of license moved from the Columbus area (northeast of Madison) to the Madison suburb of Monona, where it transmits from the water tower at the Mendota Mental Health Institute.
WTLX's current daily schedule includes programming from ESPN Radio as well as Wisconsin-based programming originating from Milwaukee-area sister station WAUK (540), including The World's Greatest Sports Talk Show with Steve 'The Homer' True (3PM-6PM), and The Badger Hour with Lance Davis (6-7PM). Weekday ESPN Radio programming on the station includes Mike & Mike, The Dan Le Batard Show with Stugotz, and Russillo and Kanell. Local weekday and speciality programming includes In the Trenches, The Miller Light Football Show, The Pat Richter Show, Wisconsin College GameDay, and PrepMania.
Live sports programming on WTLX features local high school sports play-by-play along with Marquette Golden Eagles college basketball (on which Steve True handles play-by-play duties). The station also carries national sports play-by-play from ESPN Radio, including NBA, Major League Baseball, and college football. WTLX was also the radio home of the Northwoods League's Madison Mallards until 2016, when the team's radio rights shifted to Mid-West Family Broadcasting-owned WOZN-AM/FM.
- WTLX official website
- Query the FCC's FM station database for WTLX
- Radio-Locator information on WTLX
- Query Nielsen Audio's FM station database for WTLX