The Humboldt River is the longest river in the northern and central part of Nevada. It extends in a general east-to-west direction from its headwaters in northern Nevada's Jarbidge, Independence, and Ruby Mountains in Elko County to its terminus in the Humboldt Sink, approximately 225 miles (362 km) away in northwest Churchill County.
Most estimates put the Humboldt River at 300 to 330 miles (480 to 530 km) long; however, due to the extensive meandering nature of the river, its length may be more closely estimated at 380 miles (610 km).