About

303.show is the fastest way to see what's playing tonight in Denver and along the Front Range. One list. No ads, no login, no algorithm deciding what you see.

Where the data comes from

303.show exists because of the Concert Calendar — a spreadsheet that Familiar_Leading_436 keeps up to date by hand, show by show, for the Denver scene. It's the reason this site was built, it's still a great place to find Denver shows, and this site is only here with their blessing.

The listings now come from that calendar and a set of automated sources — venue calendars and ticketing platforms — merged into one list. As of September 2026 roughly two thirds of the upcoming shows here also appear in the calendar, and a handful go the other way: dates FL436 has that this site hasn't caught. That's rather the point. A list kept by a person who goes to shows finds things no scraper does, so if you find this site useful, go look at the real thing.

Concert Calendar by Familiar_Leading_436 ♥ Open the spreadsheet →

Genres come from MusicBrainz, the open music encyclopedia, with Last.fm filling in the local bands its editors haven't reached yet — those say so on the show page. Artist photos come from Spotify. All three are volunteer- and community-built; none of them knows every act on this list, so a show with no genre just means nobody has catalogued that name yet — usually because it's an open mic or a market rather than a band.

How it works

Once a day, an automated job pulls the calendar together with the venue and ticketing sources, merges them into a single list, cleans it up, and rebuilds this site as plain, fast files served from a CDN. There's no database and nothing to sign into. Star a show and it's saved on your device only. The one thing a tap tells us is a tap on “Get tickets” — the show's ID and nothing else, so we learn which shows people want (details).

Something missing?

Tell us about it — a show that isn't here, or a room nobody's watching yet. A venue is the more useful of the two: give us its calendar page and every show it books turns up from then on. A person reads every submission, and nothing lists without going through the same checks as everything else.

The name

303 is Denver's area code — and the Roland TB-303, the little silver synth that invented acid house. Tap the logo on the homepage if your sound's on.

Shows listed

4596

Last updated

Sep 24, 2026, 7:30 PM

Cost to run

≈ $0

Not affiliated with any venue, promoter, or Roland. Show info can change — always confirm with the venue before you head out. Wrong listing, missing show, or anything else: hello303.show