Clayton Walter LaValle of Canaan, NY, passed away on March 8, 2021, in Philmont, NY. He was born on March 5, 1937, in Middletown, NY, and raised in nearby Pond Eddy. He was the son of the late Edythe and Walter LaValle. Clayton earned his Bachelor's and Master's degrees from the State University of New York at Albany. He taught mathematics at Chatham High School in Chatham, NY, for the entirety of his thirty-three-year career, and was a member of the National Council of Teachers of Mathematics. After his retirement in 1992, he volunteered as a driver for Meals on Wheels and served as the program's coordinator for the Town of Canaan. He also served as treasurer of the Chatham High School Booster Club and on the Board of the Chatham Little League. Clayton was a lifelong fan of the Brooklyn and Los Angeles Dodgers and an avid skier, and he loved spending time on the shores of Queechy Lake. Clayton is survived by his wife, Sallie Buhler LaValle, two children, James LaValle (Kristen Boddy) and Elisabeth Overmyer (Peter), and grandchildren Quinn and Birdie LaValle, and Annabelle and Samuel Overmyer. Family services will be at a later date. In lieu of flowers, the family would appreciate donations to the Columbia County Meals on Wheels program, Columbia County Office for the Aging, 325 Columbia Street, Hudson, NY 12534. Condolences may be conveyed at frenchblasl.com