Ximénez was a native of Graytown, Texas, the youngest of five children of Juan and Josefa (Caballero) Valdez; she grew up in San Antonio, receiving no formal education.
Pedro, a student of Dionicio Rodriguez and Sam Murray, produced faux-wooden cement furniture, and Beatrice learned to work with the material while helping him.
Pedro Ximénez died in 1956, and eleven years later Beatrice, inspired by children's books, science fiction films, and television nature shows, began creating animales feos, "ugly animals".
Some of her pieces were included in a 1986 touring exhibition organized by Texas Flife Resources, and in 1987 she gave a workshop in working with cement at the Guadalupe Cultural Arts Center in San Antonio.
[2][3] Ximénez's work was one of twenty artists featured in Artisans of Trabajo Rustico: The Legacy of Dionicio Rodríguez by Patsy Light and Kent Rush.