Site information:

2729 San Diego Ave, San Diego

Nothing remains of the site, and there is no tablet that I know of, although the OHP description refers to one.

~32.75406,-117.197133

Plaque information:

No plaque

OHP description:

This tablet marks the site of the Exchange Hotel. Here, on June 29,1851, Masons met for the first time in San Diego and organized the lodge which became San Diego Lodge No. 35, F. & A.M., the oldest lodge of Masons in Southern California.

Registered 10/10/1951