|City||Mountain Lake Park, Maryland|
|Broadcast area||Oakland, Maryland|
|Slogan||"Today's Hits and Yesterday's Favorites"|
|First air date||July 9, 1990|
|Callsign meaning||reference to L.A.'s KHJ|
|Former callsigns||WKHJ (1988-2018)|
|Affiliations||Westwood One News|
|Owner||Broadcast Communications II, Inc.|
|Sister stations||WKTQ, WKTZ-FM, WMSG|
The station was granted its construction permit from the Federal Communications Commission on October 18, 1988, to build a station that would broadcast on 98.9 MHz; it was assigned the call letters WKHJ on November 23, 1989. The station signed on the air on July 9, 1990. When it was located on 98.9 MHz, the station was known as "99-KHJ". WKHJ changed frequency to 104.5 in April 1998 after a ruling by the FCC that it had to accommodate a frequency move and power increase by WDNE-FM, Elkins, WV. Eventually, WPQR (now WPKL), Uniontown, PA, was also able to upgrade in power due to the move.
WKHJ-FM serves Garrett County, Maryland and Preston County, West Virginia. Studios are on Lothian Street in Loch Lynn Heights near Oakland. WKHJ-FM is owned by Broadcast Communications II, Inc. and is operated from the same facility as sister stations WKTQ, WKTZ and WMSG
The initial stockholders of Southern Highlands, Incorporated, the first owners of the station included Roger Ruff, who also served as chief operator, and Albert and Jeanne Devine. Albert Devine died in November 2004, while Roger Ruff died suddenly in May 2005.
Ben Lawrence is the Operations Manager of WKHJ-FM. Terry King is the program director of WKHJ-FM. Jim Shaffer has served as news director from nearly the beginning. Bob Mohr works weekends.
In May 2011, WKHJ and its sister stations were ordered into receivership by the Garrett County, Maryland Circuit Court. John Culp was appointed as receiver. The Federal Communications Commission approved the transfer of the license on May 19, 2011. The three stations were transferred to Broadcast Communications II, Inc. effective July 1, 2013 at a purchase price of $775,000.