Running

I do a 50 mile bicycle ride in the tropics on Saturdays. I’ve learned a few things.

1. If possible, Leave early; just as the sun rises so you only have one way in the direct sun.
2. There are a ton of sport gels out there, but the most important thing is electrolytes: trust me, the salt, potassium and magnesium will keep you more stable than the carbs in those gels— carbs were something you should have loaded the previous day. It will also optimize your hydration so the water doesn’t just flush you out.

I've had good luck with dates. Lots of carbs in a very easy to consume and easy to portion package. They were pretty easy on my stomach, too, but everybody is different.

my favorite is sliced microwaved potatoes with a little oil and lots of salt! very filling, for me a small portion goes a long way

edit: in a plastic baggy