| Noxapaga River | |
| Map Size: | 300 |
| Pushpin Map: | USA Alaska |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of the mouth of the Noxapaga River in Alaska |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Alaska |
| Subdivision Type4: | District |
| Subdivision Name4: | Northwest Arctic Borough, Nome Census Area |
| Length: | 56miles |
| Source1: | 9.5miles west of Imuruk Lake and 1.2miles northwest of Andromeda Cone |
| Source1 Location: | Bering Land Bridge National Preserve, Northwest Arctic Borough, Seward Peninsula |
| Source1 Coordinates: | 65.5869°N -163.5139°W |
| Source1 Elevation: | 946feet[1] |
| Mouth: | Kuzitrin River |
| Mouth Location: | 15miles north-northwest of Mount Bendeleben, Nome Census Area |
| Mouth Coordinates: | 65.3775°N -164.2589°W[2] |
| Mouth Elevation: | 102feet |
Noxapaga River (alternates: Kugrukruk and Kugirukuk) is a 56miles tributary of the Kuzitrin River on the Seward Peninsula in the U.S. state of Alaska.[2] Heading in the Bering Land Bridge National Preserve,[3] it flows northwest for 4miles, then west for 22miles, then south for 30miles to its mouth on the larger river.[2] Tributaries include the creeks of Aurora, Berry, Black, Bluff, Boulder, Buzzard, Frost, Garfield, Goodall, Goose, Grouse, Last Chance, Little Garfield, Mascot, Money, Peuk, Stony, Turner, and Winona.
Noxapaga River rises near Imuruk Lake and flows westward and southward, draining a total area of nearly at its junction with the Kuzitrin in the flats. Its principal tributaries are East Fork and Berry, Aurora, and Turner creeks. It drains a plateau area, none of which reaches an elevation much greater than . Most of the eastern portion of the drainage basin has been covered with a lava flow, and this portion furnishes practically all the discharge of the river at low water. The western portion of the drainage basin includes several streams on which mining operations have been conducted, especially Boulder Creek, a tributary of Turner Creek, where five or six claims were worked intermittently. The only ditch built in the Noxapaga basin has its intake on Turner Creek and extends around the rolling hills to the east for about to Goose Creek.
The river has a sinuous course across the valley lowland. About north of its junction with the Kuzitrin, the Noxapaga flows near the northern edge of the valley lowland. At this point, it receives a large tributary from the north, known as Turner Creek, where the settlement, Noxapaga, the recording office of the district, was located. Two miles above Turner Creek, the Noxapaga occupies a rather broad canyon cut to a depth of or more in a gravel-covered plain above the valley floor. About above Noxapaga settlement, the river forks, the branches being known as the East and West forks. Their upper waters lie in valleys incised in the higher plateau. Gold has been obtained from Garfield, Boulder, and Goose creeks.