Radiohead have announced three West Coast tour dates to coincide with their Coachella appearances. Those dates include a stop at Seattle's Key Arena on Monday, April 9th, a stop at San Jose's HP Paviliion on Wednesday, April 11th and a stop at Santa Barbara's Santa Barbara Bowl Thursday, April 12th.
According to the band's official website, tickets for the shows will go "on sale soon". I'd keep an eye on Ticketmaster for exact on sale times and presale info. Coachella passes are available for purchase starting this Friday, January 13th at 10 AM PT.
Newly announced Radiohead tour dates
April 9 - Key Arena, Seattle
April 11 - HP Pavilion, San Jose
April 12 - Santa Barbara Bowl, Santa Barbara
April 14 - Indio, Coachella Festival
April 21 - Indio, Coachella Festival