Mills-Pinyas has major in-situ murals in the United States, three in Costa Rica and one in Mexico. In 2016 he completed a large cycle of murals at the School of the Integrated Arts in Santa Ana, Costa Rica (Escuela Municipal de Artes Integradas, EMAI). In 2012, Mills-Pinyas created murals for Oregon State University's Hallie Ford Center with support from the Ford Family Foundation and the Oregon Arts Commission. He has completed other major murals in Cuernavaca, Mexico; San Pedro, Costa Rica; San Ramón, Costa Rica and more at Linfield College in Oregon.
Married to María Isabel Pinyas-Mills, they have made their homes and studios in the Eola Hills in Oregon's wine country and in Arenys de Mar in Barcelona, Catalonia, Spain. Ron has three sons and three grandchildren.