For many 8123 Fest attendees, the two-day event is a family reunion, drawing fans to the Valley to celebrate The Maine. On Aug. 3, The Maine announced the 2027 dates — Friday, Jan. 15, and Saturday, Jan. 16, at the Mesa Amphitheatre. Frontman John O’Callaghan still finds the festival’s success surreal.

“From the band’s perspective, from first Fest to now, it’s grown and that’s in large part to the people who keep buying tickets, keep showing up and keep supporting,” O’Callaghan said during an interview with AZ Big Media. “If they cannot buy a ticket, they voice their support via the internet.”

Persuading artists to join the lineup has taken time, he added — but the payoff is meaningful.

“We’re so, so floored by these bands that agreed to play. First and foremost, we’re huge fans of these guys, too. That makes it a lot more special.”

WOMEN IN BUSINESS: The Most Influential Women in Arizona for 2026

WOMEN IN REAL ESTATE: The Most Influential Women in Commercial Real Estate for 2026

A lineup that levels up

Two decades in, The Maine is hosting its biggest festival yet — a bill stacked with longtime friends, fan favorites and artists who helped shape the scene they came up in. Both nights feature different sets from The Maine.

Friday, Jan. 15: The Maine, The Band Camino, Beach Weather, The Aces, In Color, Franklin Jonas, the Byzantines, Moody Joody

Saturday, Jan. 16: The Maine, Andrew McMahon and the Strings Attached Quartet, The Academy Is…, The Summer Set, Nick Santino, Broadside, Sydney Sprague

8123 Fest arrives during one of The Maine’s most successful stretches. Its latest album, “Joy Next Door” — written and recorded in sequential order — is described as “arguably the band’s most essential album yet.”

O’Callaghan said the record came from a deeply personal place.

“I tried to be more introspective and be more selfish on the songwriting,” he said. “I was navigating feelings of why can’t I really appreciate what’s going on? And why does life feel like it’s flying by so quickly?”

Growing up — and writing through it

Now a father of children ages 2 and 4, O’Callaghan sees life differently. Their curiosity has reshaped how he writes and how he moves through the world.

“They get excited about things that we, as adults, find trivial, or we’ve become jaded over,” he said. “Whether it’s a sunset or seeing animals in the clouds or swimming… as far as songwriting, it inspires so many concepts and ideas.”

The band’s priorities have shifted, too.

“I have two kids,” he said. “Pat [Kirch], our drummer, has three now. It’s a far cry from being 19 years old, in a van and feeling like you could just sleep in the car every night, eat ramen until you’re blue in the face.”

The Maine has weathered plenty of chapters — label changes, reinventions, the slow build of a devoted fanbase. But this one feels different.

“It’s not like a reset, but it’s a new chapter,” O’Callaghan said. “It’s a bigger band now. It’s a larger thing than just the five of us.”

Touring, growing and opening for itself

Before the festival, The Maine will embark on a U.S. tour — including an Aug. 20 date at La Rosa where they’ll perform two sets: one acoustic, one electric.

“We’re essentially pseudo opening for ourselves,” O’Callaghan said with a laugh. “We’re going to strip them down for the first half… hopefully songs people haven’t heard in a long, long time.”

It’s the kind of challenge that keeps the band energized.

“Hopefully, these are songs that people haven’t heard in a long time or tracks we’ve never played before,” he said. 

“We like to challenge ourselves. At this point, we have so many damn songs that it’s hard to create a set list. It keeps things exciting. It keeps things fresh because we could just go out and play the same 9, 10, 12 songs, knowing those will resonate with some people.

“But there are so many people who have been to countless shows that we want to keep it exciting. Then the back half will be loud, electric rock ‘n’ roll.” 

For fans traveling in, 8123 Fest doubles as an introduction to Arizona — a place often misunderstood.

“I think people are pretty taken aback if they’ve never been to Arizona and they realize it’s not some desert wasteland,” O’Callaghan said. “If we can give people a taste of Arizona and have them leave excited, that’s a win for us.”