Underground Dispensary – Monkey Island is a medical marijuana dispensary located at 56371 OK-125 on Monkey Island, Oklahoma — the Grand Lake location of Underground Dispensary, a vertically integrated NE Oklahoma cannabis company operating three dispensaries across Miami, Grove, and Monkey Island. Set on the State Highway 125 corridor that runs the length of the Monkey Island peninsula into the heart of Grand Lake O’ the Cherokees, this shop is well positioned to serve both year-round residents and the steady flow of lake visitors drawn to the area’s resorts, marinas, golf courses, and bass fishing. Underground carries a notably broad product lineup built around its own Underground Reserve lab — concentrates, edibles, beverages, RSO, FECO, sublingual tinctures, and smoking accessories and gear alongside flower — with a patient-first philosophy that emphasizes quality, pricing, and a welcoming environment over volume. ATM on site, ADA accessible. Open Monday through Thursday 10 AM to 7:30 PM, Friday and Saturday 10 AM to 9 PM, and Sunday 10 AM to 7 PM. Reach them at (918) 713-1580.

For patients and visitors on Grand Lake, Underground’s Monkey Island location puts the full depth of a vertically integrated Oklahoma dispensary right on the peninsula — no need to make the drive to Miami or Grove.

Phone: (918) 713-1580 Address: 56371 OK-125, Monkey Island, OK Hours: Monday–Thursday 10 AM–7:30 PM | Friday–Saturday 10 AM–9 PM | Sunday 10 AM–7 PM Payment: ATM on site; Weedmaps online ordering; contact store for payment options Note: Medical marijuana; OMMA License DAAA-VKML-GLLQ; formerly Classy Grass – Monkey Island; 3-location NE Oklahoma chain; own Underground Reserve lab; concentrates, edibles, beverages, RSO, FECO, tinctures, flower, accessories; ADA accessible; ATM; Delaware County; Monkey Island OK; Grand Lake O’ the Cherokees; State Hwy 125 Website: classy-grass.com (former brand — contact store for current web presence)