Use our contact form below if you have questions about Highway 99, wish to set up an online meeting, or send an e-mail to us: You can also reach us via: Phone: (619) 752-0478‬0800-1700 M-F (8 am – 5 pm) PT USPS: Historic Highway 99 Association of CaliforniaPO BOX 178065San Diego, CA 92177 Social Media: … Continue reading Contact Information