Entry No. 9 — the Grand Junction file — filed under: speakeasy
Manhattan Project
“The name is local history, not a gimmick.”
Handlebar Tap House looks like a post-ride beer stop — 24 taps, bikes everywhere. But follow the yellow trefoil markers up two flights of stairs and you'll hit a bathroom sign next to an old bookshelf. There's a buzzer hidden on the shelf; press it and the bookcase clicks open onto a roughly 20-seat cocktail room done up in 1940s atomic style. The name is local history, not a gimmick: the real Manhattan Project refined its uranium right here in Grand Junction.
The story
Most mountain bikers downing a post-trail pint downstairs at Handlebar Tap House have no idea what sits directly over their heads. During World War II, Grand Junction served as the secret administrative and refining center for the Manhattan Engineer District, processing raw uranium ore extracted from mines across the surrounding Colorado Plateau. The atomic motif inside this room isn't a theme-park stunt dreamt up by a cocktail consultant—it is literal local history tied directly to the red dirt down the road.
To get inside, you have to ignore the 24 draft taps on the main floor and keep an eye out for small yellow radiation trefoil symbols on the wall. Follow those markers up two flights of stairs into an unassuming upstairs corridor. Next to the bathroom door sits a plain wooden bookshelf. Find the hidden buzzer mounted among the books, press it, and the shelf unlatches, swinging inward to reveal a compact 20-seat lounge dressed in 1940s atomic-era decor.
What it's like
Stepping through the bookshelf shifts the entire mood from dusty, high-decibel taproom to low-lit, intimate cocktail hideaway. With roughly twenty seats total, the space fills almost immediately on weekends; if you arrive without a reservation, expect to grab a beer downstairs while you wait for a stool to open up. Operating hours are strictly limited to late-week evenings—typically Thursday through Saturday—and the bar takes seasonal breaks, so check their web page before making the drive up Monument Road after hitting the Lunch Loops trails or Colorado National Monument.
The move: Order a beer downstairs at Handlebar, tell your date there's a second bar somewhere in the building, and race to find the buzzer behind the bookshelf — loser buys the first round of Manhattans.
📍 Before you go Enter through Handlebar Tap House and follow the yellow atomic-logo markers up two flights; the door is the bookshelf beside the bathroom sign, with the buzzer hidden on the shelf itself. The room seats only about 20, so reserve through the Handlebar site or show up on the early side — walk-ins are welcome but it fills. It only opens evenings late in the week, which makes it a natural finish to a day at the Lunch Loops trails or Colorado National Monument, both just up Monument Road. There's a parking lot at Handlebar.
- 📍 Grand Junction
- 💸 $$
- ⚡ Up for anything
- 🌗 Indoors
Where: 417 Monument Rd, Grand Junction, CO 81507 (upstairs inside Handlebar Tap House)
Hours: Added 2026-06-11 — confirm current hours before you go.
Pair it with
- Moody's Lounge — Pair an atomic bookshelf door with Grand Junction's other concealed drink spot, tucked behind a glowing neon musical symbol downtown.
- Whispers From The Past Ghost Walk — Follow up secret WWII history upstairs with a guided nighttime walk through downtown Grand Junction's former red-light district.
- Western Colorado Astronomy Club Public Star Parties — Trade a dimly lit 1940s atomic lounge for dark-sky star observation with local amateur astronomers in the Grand Valley.
Good to know
Where is the hidden entrance located?
It's inside Handlebar Tap House at 417 Monument Road. Walk past the downstairs bar, follow the yellow atomic markers up two flights of stairs, and look for the bookshelf next to the bathroom sign. The buzzer to release the latch is hidden on the shelf itself.
Do I need a reservation to get in?
Walk-ins are allowed, but because the room only seats around 20 people, reserving in advance through Handlebar's website is the safest move—especially on Friday and Saturday nights.
What is the connection between Grand Junction and the Manhattan Project?
During WWII, Grand Junction was the secret refining and logistics hub for the Manhattan Engineer District, processing uranium ore harvested from the Colorado Plateau.
When is the bar open?
It generally operates Thursday through Saturday evenings, though it occasionally closes for seasonal hiatuses. Always confirm their current schedule online before heading out.
Plan a visit & invite your people →
Further reading: handlebargj.com · blockpartygj.net · Yelp · ahf.nuclearmuseum.org · cpr.org
last checked: 2026-06-11