The series began broadcasting in 1989 and is produced by PVPMedia. The principal performing band on Riverwalk Jazz is the Jim Cullum Jazz Band. The series co-hosts are bandleader Jim Cullum, Jr. and folklorist and storyteller David Holt. Jim Cullum's Landing Jazz Club  on the Paseo Del Rio (San Antonio River Walk) in San Antonio, Texas serves as the venue where most of the hour-long shows are produced.
In 2012, the Riverwalk Jazz Collection was donated to the Stanford Archive of Recorded Sound by PVPMedia. Two continuous streams of almost every Riverwalk show can be accessed from Stanford's Riverwalk Jazz site.
Through the use of live music performance, narration, autobiographies, historical recordings and musical demonstrations, the series focuses on jazz from before World War II as played by the great pioneers such as Jelly Roll Morton, Joe "King" Oliver, Louis Armstrong, Bix Beiderbecke, Sidney Bechet, Duke Ellington, Fletcher Henderson and many more. Also featured are the lives and music of the great interwar pop composers such as George and Ira Gershwin, Rodgers and Hart, Harry Warren, Harold Arlen, Irving Berlin, Jerome Kern and many others.
Frequent guests include playwright and actor Vernel Bagneris, pianist Dick Hyman, vocalists Topsy Chapman and Nina Ferro, cornetist Bob Barnard, as well as guest bands such as the Hot Club of San Francisco. Other notable musical guests in past years have included Benny Carter, Linda Hopkins, Bob Wilber, Bob Haggart, Yank Lawson, Kenny Davern, Harry "Sweets" Edison, Clark Terry, Bucky Pizzarelli, John Pizzarelli, Rebecca Kilgore, Ralph Sutton, Ken Peplowski, Doc Cheatham, Savion Glover, Milt Hinton, Jay McShann, Joe Williams, Shelly Berg, Catherine Russell, Bob Havens, Carol Woods, Harry Allen, Howard Alden. Marty Grosz, Lionel Hampton, Vince Giordano, Warren Vaché Jr. and William Warfield.
The Riverwalk Jazz official web site provides weekly streaming of the radio broadcasts as well as JazzNotes about each week's show, as well as enabling registered users to receive monthly and weekly email newsletters.
The current personnel of the Jim Cullum Jazz Band includes Jim Cullum, Jr., leader and cornet; Ron Hockett, clarinet and saxophone; Kenny Rupp, trombone; Jim Turner, piano; Howard Elkins, banjo and guitar; Steve Pikal, bass; Hal Smith, drums. Past personnel heard in encore performances on the radio series include John Sheridan, piano; Allan Vaché, clarinet; Mike Pittsley, trombone; Brian Ogilvie, clarinet and saxophone; Evan Christopher, clarinet; Don Mopsick, bass; Mike Waskiewicz, drums; Ed Torres, drums, Kevin Dorn, drums and Benji Bohannon, drums.
- Interviews with Jim Cullum, Jr., June 11, 1980, August 12, 1986, University of Texas at San Antonio: Institute of Texan Cultures: Oral History Collection, UA 15.01, University of Texas at San Antonio Libraries Special Collections.