Mammoth Spring Bank Address: 465 Main St, Mammoth Spring, AR 72554 Phone: (870) 625-3339 Banks Other Businesses: Simmons First National Bank at 165 Main St, Mammoth Spring, AR 72554 Southfork Resort at 7230 Highway 289 N, Mammoth Spring, AR 72554 Riverview Motel at 423 Hwy 63 S, Mammoth Spring, AR 72554 Fred's Fish House at 215 Main St, Mammoth Spring, AR 72554