OKLAHOMA LAKES Isom 3 Lake Bryan County, OK BE THE FIRST TO WRITE A REVIEW SHARE THIS PAGE Isom 3 Lake is located in Bryan County, Oklahoma. This lake is 14 acres in size. BUY A OKLAHOMA FISHING LICENSE. SIZE 14 acres ELEVATION 604 ft POST A FISHING REPORT BAROMETRICPRESSURE WEATHERINFO WIND MAP& FORECAST SUN/MOONINFO