Longest Run Before Vegas

I ran 20 miles today. This will be my longest run before the New Las Vegas Marathon. My left leg hurt for every step for the first 10 miles not like I was running hurt or I would hurt myself but the bunion seems to almost pinch something so that other parts of my leg besides my toe hurt. I thought of stopping at mile 4 but I needed to run 20 so I took it easy. From mile 10 -20 only mile 16 hurt and my HR for 1-10 was 140-148 not too bad but 11-20 HR was 146-154 really where I want to be on this kind of training run. I ran 20 miles in 2:56:10 for 8:48.5/mile. This is about 25 second slower than I would have liked but the first 10 miles were painful and the next 10 were beautiful. The temperature range was 34-54 degrees F. I was cool most of the time with a long sleeve over a short sleeve HiTech shirt, tights, gloves, and my fuel belt. Gatorade and apple juice (in separate bottles). Chocolate Gu at mile 6 and mile 12. 41 total miles for the week.