Best Electrolyte and BCAA Stack for Endurance Athletes Canada

I am a trail runner in British Columbia and the terrain here is very demanding. I am looking for the best electrolyte and BCAA stack for endurance athletes in Canada. I find that I lose a lot of salt during my long climbs and I want something that keeps my muscles from cramping up.

I have been looking at BioSteel and some other local brands. I want a stack that tastes good even when it is warm in my hydration pack. I am also wondering if adding some Beta Alanine to my intra run drink would help with the lactic acid buildup on the steep hills.

What do you endurance folks swear by for your long efforts? I am looking for a clean formula without a lot of artificial colors or sweeteners. I would appreciate any advice on how to stay hydrated and fueled during those four hour mountain runs!