What is the minimum age for Flatline Fest?

Flatline Fest requires attendees to be 18 years or older. A valid photo ID is required for entry.

How do I get to The Oriental Theater?

The Oriental Theater is located in Denver, Colorado, United States. Transport options include rental cars, rideshare services, and official event shuttles. Check the festival website for shuttle schedules and parking information.

What kind of music does Flatline Fest feature?

Flatline Fest features Punk, Metal, Stoner Rock.

Flatline Fest 2026

Sarah Pagel · 28 February 2026

13 Jun 2026 – 14 Jun 2026 Denver, United States 18+

Flatline Fest is a two-day extreme metal music festival held at the Oriental Theater in Denver, Colorado. What makes it unique is that it is curated by a local metal producer, Dave Otero, and showcases a blend of international and local bands he has collaborated with.

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Flatline Fest

What Flatline Fest offers

Punk Metal Stoner Rock

The sound system will be unforgiving. Loop lets you hear every detail at a safe volume – no ringing on the train home. As an Amazon Associate we earn from qualifying purchases.

For fans

Where you'll be

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The Oriental Theater

4335 W 44th Ave., Denver, CO 80212

Local Currency: USD

Consider paying in USD locally. Bring cash or use a payment card that supports this currency to avoid extra fees.

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Sarah Pagel

An independent music & festival researcher with 10+ years in the global dance scene.

28 February 2026