Martis Creek is a northward-flowing stream originating on Sawtooth Ridge, west of the peak of Mount Pluto in Placer County, California, United States.

The presence of beaver dams has been shown to either increase the number of fish, their size, or both, in a study of brook, rainbow and brown trout in Sagehen Creek, which flows into the Little Truckee River.

[7] Prior to the arrival of European inhabitants and fish species declines probably related to logging and overgrazing, Martis Creek was an important year-round fishery for the Washoe people.

Fishery resources included Lahontan cutthroat trout (Oncorhynchus clarki henshawi) (LCT) and a variety of smaller species, such as sucker and chub.

[4] In June 1978 the California Department of Fish and Game stocked LCT in Martis Creek Reservoir, after reducing non-native resident trout using piscicides.