How do you get into Underground Lounge?
We have not confirmed it. Underground Lounge is in the directory because it calls itself a speakeasy, and that is the whole of what we can stand behind about its door.
The drinks at Underground Lounge
How the venue describes itself: “Official site of Mammoth Mountain Ski Area. California’s best resort for skiing and snowboarding in the winter, and mountain biking in the summer.” (from its own website, retrieved 9 October 2026)
Beyond what the venue publishes we have not verified a list, so what follows is the period rather than the bar: Sazerac, Ward Eight, and Scofflaw are all drinks of this era, and each links to its origin and its build.
Where Underground Lounge sits
Underground Lounge is in Mammoth Lakes, California, in Mono County, in the West of the United States.
This is currently the only verified hidden bar our directory lists in Mammoth Lakes. If you know another, tell us.
California holds 173 listed venues in this directory. See them all on our California speakeasy guide.
Prohibition in California
California came under national prohibition on 17 January 1920, when the Eighteenth Amendment took effect and the Volstead Act defined an intoxicating beverage as anything above one half of one per cent alcohol — a threshold strict enough to close breweries that had expected to survive.
More on the period in our history of Prohibition in California.
What the newspapers recorded in California
Searching the Library of Congress run of California newspapers for speakeasy, blind pig and bootlegger across 1920 to 1933 returns dated pages anyone can open. These are from California:
- La prensa, March 6, 1920 — read the page at the Library of Congress
- Imperial Valley press, June 14, 1920 — read the page at the Library of Congress
- Imperial Valley press, October 18, 1920 — read the page at the Library of Congress
- Imperial Valley press, November 5, 1920 — read the page at the Library of Congress
Planning a visit
You can reach Underground Lounge by phone on (760) 934-0707, through its own website, and on Facebook, Instagram, Tiktok, and Youtube.
The address is 6201 Minaret Rd, Suite 153, Mammoth Lakes, CA 93546. Open in Google Maps.
What we have confirmed
For Underground Lounge we hold street address, telephone number, official website, and social accounts. We do not yet hold opening hours, a published drinks list, an online booking link, or a listed-building record.
It is in the directory because its own name calls it a lounge and calls it underground and the description in the source data describes it as a speakeasy.
Overture Maps carries this venue; OpenStreetMap has no matching record.
The source data classifies the premises as a bar.