Mount Eddy, Mountain summit in Siskiyou County, California, US

Mount Eddy is the highest peak of the Trinity Mountains, part of the larger Klamath Mountains system in northern California, rising to 9,037 feet. The summit sits within a landscape of forested slopes and alpine meadows typical of the region.

Mount Eddy honours Olive Paddock Eddy, long credited as the first woman to climb Mount Shasta, though she was eight months pregnant at the time and Harriet Catherine Eddy actually made that first ascent. The name also recalls Nelson Harvey Eddy, who came from New York State in 1856 and became a rancher in the Shasta Valley. The Wintu knew the peak as Num-mel-be-le-sas-pam, "west blaze mountain".

The Wintu name recorded for the peak is Num-mel-be-le-sas-pam, rendered as "west blaze mountain". The mountain's English name honours Olive Paddock Eddy, long credited as the first woman to climb Mount Shasta, though she was eight months pregnant at the time and Harriet Catherine Eddy was in fact the first woman to reach that summit.

The main hiking route to the summit is about 9 to 10 kilometers round-trip via Forest Road 17 with considerable elevation gain. The trail can vary in conditions depending on the season and requires good physical preparation.

Mount Eddy is made of Mesozoic ultramafic rock, mostly serpentinized peridotite, and lies within the Mount Eddy Research Natural Area of Shasta–Trinity National Forest. Its summit is the highest point in Trinity County and the highest summit in the United States west of Interstate 5.