Saturday long run, 4 hours

I went over the details of this run with Coach Bill on Sunday, so I'll list my splits and be brief:
5 minute run / 3 minute walk
1 -7:54/mile pace - just 'feeling out' the slower pace
2 - 7:36
3 - 7:25
4 - 7:31
5 - 7:17
6 - 7:20
7 - 7:24
8 - 7:20
9 - 7:29
10 - 7:32
11 - 7:41
12 - 7:35
13 - 7:41
14 - 7:50
15 - 7:59
16 - 7:24
17 - 7:57
18 - 8:00
19 - 7:32
20 - 7:20
21 - 7:33
22 - 7:34
- long break -
23 - 7:46
24 - 7:53
25 - 8:06
26 - 8:06
27 - 8:11
28 - 8:25
29 - 8:28
30 - 8:35
Totals: 4 hours 4 minutes 19 seconds, 24.10 miles, 6am-10am, usual course
This run went really well. The first 2.5 hours were very smooth and felt easy. For the last hour and a half, my quads were burning and my times slowed down. As I mentioned to Bill, I didn't become locked in to specific split times/paces, I focused on giving a good effort on every rep.
This run certainly went better than the three hour run. I believe this is due to several factors including starting earlier, eating better the previous day, not focusing on splits, and adding electrolyte tablets to the routine.