When guitarists/singers Miles Doughty and Kyle McDonald started Slightly Stoopid in 1994, they were out front of a second generation of bands that wanted to build on the reggae-rock sound that was starting to take hold thanks to the success of groups such as Sublime, 311 and, to a lesser extent, No Doubt.

Now 30-plus years later, Slightly Stoopid is one of several California reggae-rooted bands that can headline outdoor amphitheaters and a veteran member of a scene packed with acts playing some variation of reggae-rooted music and espousing California culture built around skateboarding, surfing and, in many cases, the benefits of cannabis.

In fact, touring amphitheaters has become an annual summer ritual for Slightly Stoopid and it has become well-versed at knowing what it takes to deliver a large-scale show to crowds that can number upward of 20,000.

Slightly Stoopid is coming Sunday to Colorado Springs for a show at Ford Amphitheater.

“Now it’s kind of like we’ve got a great crew, awesome lights guy,” Doughty said in a recent phone interview. “Everybody kind of knows what we’re all thinking. It just makes it that much easier when you surround yourself with the right people and the right energy. It’s like anything. If you’ve done something so many times, you get a lot better at it and start to perfect what’s going on around you.”

There’s been no magic formula to Slightly Stoopid’s success. The group built its following the old-fashioned hard way, playing 200 or more shows a year during its first decade. Over the years, Slightly Stoopid also added band members to go with its expanding instrumental mix. Today, the lineup includes Doughty, McDonald (guitar, bass, vocals), Ryan Moran (drums), Daniel “Dela” Delacruz (saxophone), Paul Wolstencroft (keyboards) and Andy Geib (trombone),

And as the touring miles piled up, Slightly Stoopid released studio albums on a regular basis, developing and refining their sunny brand of reggae mixed with rock, funk, folk, pop and even punk rock along the way.

The group’s ninth and most recent studio album, “Everyday Life, Everyday People,” arrived in 2018. The band has released a new single, “Step Into The Sun,” to coincide with this summer’s tour and plans to release a new album next year.

Slightly Stoopid figures to keep the good vibes flowing on tour this summer with Iration and Little Stranger opening the shows. Doughty said there’s always a chance fans will see musical collaborations on stage between Slightly Stoopid and the other musicians.

“What’s cool is it’s really something just special for the fans when they can see that kind of camaraderie,” Doughty said. “There’s nothing like set up about it. That’s what’s so special about the bands. People can relate because we’re all just regular, real people.”