Hathaway Pines is an unincorporated community in Calaveras County, California, 8 km south of Arnold and 20 km northeast of Angels Camp. It lies at an elevation of 3323 feet. Hathaway Pines' post office was established in 1943; it has the zip code 95233.The place's name honors Robert B. Hathaway, a vacation resort promoter who became the first postmaster.This region experiences warm and dry summers, with no average monthly temperatures above 71.6 °F. According to the Köppen Climate Classification system, Hathaway Pines has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.