Mama's on the Half Shell

Name: Mama's on the Half Shell
Address: 2901 O'Donnell St, Baltimore, MD, US
Price range: $$

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O'Donnell Square with Mama's on the Half Shell's mermaid sign · Photo: Julie M. Kichline · CC0

The green-awninged oyster house holding down the corner of O'Donnell Square, and the one the founding family kept when they closed sibling Nacho Mama's across the street in January 2025. Raw bar and crab cakes are the draw; happy hour runs Mon-Fri 3-6pm, first-floor bar only. Weekend doors open at 9am for brunch, so it works as a starting line as much as a dinner anchor.

Address: 2901 O'Donnell St
Hours: Mon-Thu 11am-10pm; Fri 11am-11pm; Sat 9am-11pm; Sun 9am-10pm
In the guides: Crab cake, and what each one costs
Oysters, and when they are cheap
Monday nights that are actually worth it
Parking: Street parking only around O'Donnell Square; no public garage in Canton.
Age rules: Not stated
Accessibility: Not published; first-floor-only happy hour implies stairs
Official links: mamasonthehalfshell.com
Verified: Verified Sep 17, 2026 against Official site; Baltimore Banner; Baltimore Magazine; its own site and happy hour menu for the happy hour, read Oct 22, 2026. Facts can drift; if something here is wrong, tell us and we’ll fix it. How we check.
Not yet confirmed: Upper-floor access

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