Mt. Sopris Montessori School Primary & Secondary Education Mt. Sopris Montessori School Visit Website Request Info 879 Euclid Avenue Carbondale, CO 81623 (970) 963-3506 (970) 704-0196 (fax) About About Carbondale based preschool since 1981 serving children 18 months to 5 years. We provide excellent early childhood Montessori education to each child.