Frost-free Citrus Belt ID: 1335 | This file appears in: Gilbert Road Station A combination of factors, including elevation and airflow, made this area more resistant to freezing than most other areas in the Salt River Valley. | Date: n.d. | Source: Mesa Preservation Foundation Download Original File SourceMesa Preservation FoundationDaten.d. "Frost-free Citrus Belt" appears in: Gilbert Road Station