As far as length of run before eating: you will just have to figure it out with experience. A lot done people bring too much food/water, which is fine. (Similar to “packing your fears” backpacking.) I think I wore a camelback my first trail half marathon, which is embarrassing.
But if it gets you out there, do it!
You will feel when you start to bonk. That’s the length of run you need to eat/drink. For me, I’ve gone up to 18 miles without food and water, but that didn’t leave any room for contingencies.
Starting out, I’d say bring some food and water for over 10 miles or over 1.5 hours. Doesn’t have to be much. I’d say, once you’ve done a handful of long training runs, you’ll get to the point where bringing food and water is inconvenient and not necessary for runs under 2 hrs.
But if it gets you out there, do it!
You will feel when you start to bonk. That’s the length of run you need to eat/drink. For me, I’ve gone up to 18 miles without food and water, but that didn’t leave any room for contingencies.
Starting out, I’d say bring some food and water for over 10 miles or over 1.5 hours. Doesn’t have to be much. I’d say, once you’ve done a handful of long training runs, you’ll get to the point where bringing food and water is inconvenient and not necessary for runs under 2 hrs.