Q: Right rear brake gets hot and smells after going up a steep mountain on 2006 Toyota Matrix

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Twice while driving up the same steep grade (1/4 to 1/2 mile) I have gotten out of the car to find the passenger side (right) rear brake hot, smelly and smoking. It seems like this steep grade causes the right rear brake to come on and stay on. Could it be a problem with the routing of the emergency brake cable?
(1) Answer
I would suspect,brake cable sticking enough to drag the shoe on the drum serface,why going up hill or steep grade causes this i,m not sure,but seems could have a bearing on the emergency brake cable if there are worn parts on the rear suspension,causeing an out of alighnment of proper tracking of that wheel.