My long run last week, which was 18 miles, reminded me of a lot of things I'd forgotten since I last did long runs that were approaching the 20 mile mark.
Fuel. I went years without using fuel on my long runs. Once I found a fuel my stomach can handle, it made a huge difference in how much energy I have at the end of my runs. On my 16 miler the previous week, I noticed how hard it felt between miles 8-10. I typically take a GU before I hit mile 8 for this very reason. So on my 18 miler, I GUed at 7.5 and 13.
Tomorrow I'll put these three things to the test again, but it's a drop back week so my long run is a little shorter. Then it's time for 20 next week!
Tomorrow I'm not running alone, which always makes it seem a little (and sometimes a lot) easier.