Red Rocks Locksmith Longmont The Longmont team handles home and car lockouts, lock rekeying, commercial door locks, and replacement vehicle keys. Call the 3rd Avenue location to ask about shop hours or schedule mobile locksmith service in Longmont. 525 3rd Ave Unit 124, Longmont, CO 80501Website Address: Red Rocks Locksmith LongmontPhone Number: 720-902-5019 Spread the word!