Does anyone else here have trouble with mental fatigue during medium-length to long rides? I find that often times when I ride, if I stop for even a few minutes I suddenly feel depressed and don't want to continue. Sometimes this makes it hard to focus while riding. This happens both when riding alone and with a group. It seems like this fatigue often sets in when my body feels fine and I have plenty of energy left in my legs. If I go out a long distance and have to come back, the mental fatigue will hit me as soon as I stop at my turn-around point, so I feel like it may have something to do with my adrenaline level dropping.
Any ideas on how to avoid this? I'm pretty diligent about eating to avoid bonking, so I can't figure out what else I can do.