Flatline Fest

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Flatline Fest

Colorado Extreme Metal Festival // June 13th and 14th 2026

06/01/2026

SPONSOR ANNOUNCEMENT: In searching for the best cable company for an angry, scary metal festival, the obvious choice is in fact, Happy Cable Company: Bespoke handmade cables built in the peaceful wine country of Temecula, California

Founded by a metal guitarist, their cables feature Neutrik Gold connectors and high-end braided finishes for durability and looking cool as s**t.

05/29/2026

We’re thrilled to welcome Glacial Tomb to the Saturday night lineup for Flatline Fest!

Due to a family emergency, Of Feather and Bone will no longer be able to perform this year. We’re wishing them all the best and are grateful to Glacial Tomb for stepping in.

Limited tickets are still available (less than 30) for Saturday night.

05/26/2026

Our festival sponsor put together these awesome exclusive sampler CDs just for .

All attendees can grab their own sampler CD at the merch booth for FREE.

The compilations feature hard-hitting Metal Blade Bands and a handful of songs produced/mixed/mastered by

Need some new tunes? Follow the label as well as their featured bands:

ca

iria

ufo

05/17/2026

If you fess up in the comments I'll make sure Dave personally signs your stolen poster.

05/08/2026

Fewer than 75 two-day passes are available for Flatline Fest 2026.
VIP tables for Saturday are sold out.

Get yours while you can at FlatlineFest🎟️com

05/06/2026

⚠️ Sponsor Highlight ⚠️
Providing the backline (shipping all the way from Germany) for this year's fest is our favorite Sonic Doom Device producer: Lichtlaerm Audio

We'll be featuring custom Lichtlaerm cabinets and their signature Prometheus amp. If you are not aware, this is insanely fu***ng cool.

Not only do they perfectly match the aesthetic we wanted for the fest visually, we are very particular about quality, and knew that these would deliver and far surpass expectations. As we are a festival presented by a music producer, there was no cutting corners in this arena. There is currently a waitlist for their Prometheus tube amps, but you can snag their highly-sought-after custom pedals on their website now.

04/14/2026

Who the hell is behind Flatline Fest? Well, it's these two well-lit humans, Dave Otero & Chelsea Lowe.

Dave Otero is the mastermind behind Flatline Audio and has been producing, mixing, and mastering extreme metal as literally his only job for decades.

Chelsea Lowe is the weirdo behind these posts and the entreprenihilist behind FootClothes. She's a long time performer in both the metal and magic worlds and feels weird writing a post about herself in the third person. She works alongside the Dave to bring the business, the branding, and the puns.

They are getting married the day before the festival because they are insane.

Photography by .snaps

Flatline Audio - Producer Dave Otero

04/09/2026

Wanted to share this process video of the Flatline Fest merch and poster art from Dipayandas Art. Follow him here on facebook for more super sick artwork. So. Many. Lines.

04/08/2026

Handling the merchandising for this year's Flatline Fest will be none other than FootClothes. Is it because one of the promoters of Flatline Fest also owns a sock company?

Yes, that is precisely why.

But we'll be one of the only metal festivals with frickin' socks alongside some locally printed shirts (unisex AND female cuts) as well as a small handful of hoodies and patches, so we're going hard. Stay tuned for those announcements and while you wait, go buy some socks. Thanks.

04/06/2026

Our next sponsor announcement: Metal Blade Records.

Flatline Audio has a long history with Metal Blade, and we’re honored to have them on board for the first Flatline Fest.

Represented on the lineup by:

Address

4335 W 44th Ave
Denver, CO
80212

Website

http://flatlinefest.com/

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