Smith Lake (Athabascan: Tr'exwghodegi Troth Yeddha' Bena') is a lake in Fairbanks, Alaska on the property of the University of Alaska Fairbanks. It is triangular in shape, roughly .
The university maintains ecological and hydrological monitoring sites at the lake.
Smith lake is a good wildlife viewing location.
Bird species found at the lake may include Pacific loons, ring-necked duck, bufflehead, American wigeon, northern pintail, northern shoveler, green-winged teal, red-necked grebe, horned grebe, Bonaparte's gull, Wilson's snipe, lesser yellowlegs, long-billed dowitcher, red-necked phalarope, pectoral sandpiper and Bohemian waxwing.
In winter the frozen surface of Smith Lake is popular with ice skaters and cross-country skiers.