So I have towed one of my boats up to Huntington Lake for regattas twice. The lake is at 7,200 feet and close to a 600 mile round trip. The weather was really hot once I moved inland, 95-105 degree range. Ran around 60 mph on the flat areas but the grades were slow and painful especially in the heat. Never overheated but got pretty close a couple times and just pulled over and let it cool down. Brakes were a little dicey in a couple spots, but using engine braking helps mitigate the issue. But I never got left sitting on the roadside waiting for tow truck.