Beginning in 1875 and lasting through the early 1900s, logging profoundly altered the western side of the San Jacinto Mountains as camps and mills were established in the mountains and large stands of ancient old-growth forest were cut by uncontrolled logging. The boom was driven by demand for Southern Pacific Railroad ties laid through the San Gorgonio Pass, shipping crates for the citrus industry, and houses for the growing valley population. In the western portion of the park, remnants of two logging camps and at least one lumber mill site have been identified, and much of the landscape still bears the scars of logging in cut tree stumps, logging roads and trails, and abandoned machinery. Dedicated in 1937, Mount San Jacinto State Park culminated more than forty years of private and public efforts to preserve the San Jacinto wilderness from uncontrolled exploitation.