On Whitney my water intake necessitates that I pee 1-2 times per hour, sometimes more. Am I drinking too much?
The mantra is to hydrate. The mantra is overdone. I will catch a lot of flack for saying that, but yes, some overdo it.
You only need 500ml of urine per day to dissolve waste products, at least at rest and suitable conditions. No one would recommend you do that, though. Enough hydration to keep urine clear is recommended while doing all day exercise. Part of that is to guarantee in advance that you do not get behind. Staying ahead of dehydration IS important. An ounce of prevention is worth a pound of cure.
Twice an hour voiding is a lot(depending on size of bladder of course.) One of my hiking friends has a 1.5 liter pee bottle that he can nearly fill up in one go. Not me.
There are indeed people who get too few electrolytes, and too much water, and become hyponatremic (low sodium concentration). Typically this would occur in extreme settings like marathoners, hot/dry environmental conditions, co-existing GI illness, etc. or other medical or psychiatric conditions, certain diagnoses, meds, or obsessively excessive water replacement.
The worst case I ever saw was not a hiker, but a small man with kidney trouble. His dutiful but much, much larger wife keep plying him with water (as told to). He developed what we call water intoxication, yes too much water. His blood sodium level dropped from normal 140 to 102 and he had a seizure.
