Chinook salmon spawning stock estimates for the Sacramento and San Joaquin drainages for the period 1940–1959 and for 1962–1963. Data are from Hatton and Clark (1942), Fry (1961), and unpublished CDFG reports; data for 1962–1963 only are from CDFG (1964). Numbers in square brackets are incomplete estimates for which data from major streams either were missing or excluded a major fraction of the spawning run; ND denotes no data available.