American Pop artist Andy Grammer is ready to host fans in Grand Junction for a night of fun at the Amp at Las Colonias. The band Walk Off the Earth will open up the show on Sunday, August 2. Keep scrolling to find out more about ticket options, the Amp Lounge upgrade, and how to win tickets with our station app. What to Know Before Heading to The Amp in AugustAugust is a busy season at The Amp at Las Colonias. Grand Junction offers several parking choices near the venue, including free lots, downtown parking areas, and even bike access via the Colorado Riverfront Trail.