A turbine blade having a three pass forward flowing serpentine flow cooling circuit with a first leg connected to exit cooling holes along the trailing edge of the blade, a third and last leg discharging cooling air from the serpentine flow circuit through pressure and suction side film cooling holes, and two blade tip peripheral cooling channels extending along the pressure side and the suction side of the blade tip to provide cooling. Each peripheral channel includes film cooling holes on the blade tip side walls and exit cooling holes on the tip cap. All of the cooling air from the first leg channel that does exit out the trailing edge holes flows into the last leg without discharging through holes in the blade tip. All of the cooling air flowing out the peripheral channel cooling holes flows out from the last leg of the serpentine flow circuit.