"Tuolumne County's Most Experienced and Longest Established Alarm Company"

Tuolumne County: (209) 532-9662

Calaveras County: (209) 754-0459

Office Location:
21115 Longeway Road - Unit # B

Sonora Ca, 95370

Monday–Friday 9AM–5PM

Mailing Address:

P.O. Box 5031
Sonora Ca, 95370

Contractors Lic# 555389
ACO Lic# 3058


For nearly forty years, the Molinari family has been dedicated to providing reasonably priced, innovative security solutions and unparallel service to private residences, businesses of all types, schools, and government agencies throughout the Mother Lode region.  If you’re looking for a local alarm company with a fanatical commitment to provide the best security and service, you’ve come to the right place.  We hope to be able to provide you with a no charge security review and estimate.


Voted Best Alarm Company 

in Tuolumne and Calaveras

Five Years in a row!

There is a difference




Thank you for visiting MountainAlarmInc.com. Established in Sonora California in 1989, We are The Mother Lode's leaders in Home Security, and specialize in the following:

• Residential & Commercial Security Systems
• Commercial Fire Alarm Systems
• CCTV / Security Cameras
Medical Alert Systems
• Home Intercoms - Structured Cabling Systems
• Home Theater and Whole House Sound Systems
• Home Central Vacuum Systems
• Access Control Systems
• 24 Hour U.L. Central Station Monitoring
• Technicians Available 24/7
• New Construction Pre-wiring
• Senior Citizen and Contractor Discounts
• Radio Dispatched Service Trucks
• Clean And Professional Installations
• Call Today For A Free, No Obligation Estimate Today!

Mountain Alarm, Inc. installs quality alarm systems in these Counties:
• Tuolumne County California
• Calaveras County California
• Mariposa County  California
• Amador County    California
• Portions of Stanislaus County California

Local Service by Local People



“You’ve worked hard for years, a burglar only works minutes”