Abstract: : A field study of flood conditions in the White Mountains of California and Nevada was carried out during the period September 1966 to August 1967. The investigation was a follow-up to a similar study conducted in 1956- 57. Flooding during the decade 1957-66 has produced significant changes in parts of the White Mountain landscape. One minor and two major debris flows occurred during the period, and minor snowmelt flooding was frequent. Flooding observed during the contract period was of the three types known to occur in the study area: wintertime, snowmelt, and cloudburst floods. Floods were observed in December 1966, May-June 1967, and July-August 1967. The observed and reconstructed behavior of floods in and near the White Mountains during the period 1957-66 was in accord with the indicated principles.