I tried Clif Electrolytes Mix in my 3+ hours race in 95F weather 2 weeks ago and I had 0 issues. They had it at aid stations and since water wasn't cutting it for me, I tried it even if it was something new for me. It worked great! I usually find those kind of drink too sweet but it tasted more salty than anything I've ever tasted before. Sad part is I can't find it in Canada

I'm using a diluted mix of Cytomax lately (too sweet for me if I follow the ratio they give on the jar) and I think it's making a difference in the very very hot days vs only water. I'm not sure how much sodium and such it has, but I figure it's better than nothing.

Thanks all for the suggestions.