AFTER 13 years with Grandaddy, Jason Lytle, the introvert behind the indie-tronica icons, was fed up.

So after he finished recording the group’s fifth album, “Just Like the Fambly Cat,” the 36year-old singer and onetime pro skateboarder broke up the band and moved from Modesto, Calif., to Bozeman, Mont., pop. 35,000.

Near the mountains, with hiking, skiing, bike trails, WiFi and skateboard parks, the town fit Lytle perfectly. “People in Modesto are sick and want to kill themselves,” he says. “It’s really beautiful here. It’s inspiring to get out and do s – – t.” Unfortunately, he only knew one person.

“I felt like a creepy, loner, drifter guy,” he says. Then he met some like-minded folk. “Now it looks like I have some friends. I love the concept of being rewarded for putting yourself in a fearful situation.” He didn’t know that “Fambly,” a nod to “The Grapes of Wrath,” would be the band’s last album when he recorded it, although it has that air to it.

For Grandaddy’s farewell shows, which come to Joe’s Pub on Saturday and July 24, Lytle performs with friend Rusty Miller of Jackpot. Another pal, Nik Freitus, will open.

“It was super simple and the complete opposite of what things had graduated to,” he says, “with bloated tour buses and people being paid too much and going home broke.

“This will be all of us driving in the same van with no crew,” he adds.

“We’re gonna do some skateboarding and camping, [like] a vacation with some shows throw in.”