My fall crop of peas is a couple feet tall now. I planted them on August 11. The variety is Alderan (Tall Telephone).
Here's the description form Sandhill Preservation Center, where I got these heirloom seeds: "Alderman (Tall Telephone): 75 days. I remember how much I enjoyed growing this variety in the cooler Springs in the Northwest. There it would reach 6 feet tall and be loaded with pods. Our rapidly changing climate here makes them shorter."