Diamond Shamrock 2024-11-28 Roadnow click anywhere on map to find more poi nearby Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to Diamond Shamrock Portland, TX 12.61 mi Gregory, TX 17.47 mi Taft, TX 20.45 miInterstate highway exits close to Diamond Shamrock Exit 1c, i37 0.53 mi Exit 1a, i37 0.55 mi Exit 1b, i37 0.55 miInterstate highways close to Diamond Shamrock i37 map 0.53 mi i35 map 192.71 mi i410tx map 197.45 miState roads close to Diamond Shamrock TX 35 map 0.74 mi TX 286 map 0.89 mi NHS HIGH PRIORITY CORRIDORS 18 map 2.58 mi