Apologies for the semi-long backstory, but hopefully it's helpful for context.
I'm trying to figure out how to plan out the rest of my running for 2018 to get the most out of a Nov. 3rd half marathon. I started running consistently in 2015 and have since run 2 marathons (one was my first race ever) and a few halfs. The first marathon ended quite poorly, as I'm sure many would have predicted given my very small base and a max of 45 mpw during the training. It's clear that I'm better (relatively speaking) at shorter distances compared to longer ones - cramping is an issue, even at the very end of the half PR that I have. However, despite that fact, I still have a lifetime goal of a sub 3 marathon (along with many other people who post threads like these).
I've been running about 35-40 mpw so far for the last few months, with tempo/VO2 max workouts and a 10-12 "long run" each week. I'm currently looking at running a 5k on 6/16 and then a 10k on 8/25 before the Nov. 3rd half. I just finished reading Pfitz's Faster Road Racing for more background knowledge on training and for training plan ideas. I think I’m going to use a modified one for the 5k I have in June.
So here’s my question: would I be better off having an 8-9 week specific training block for the 10k in August, and then another specific block for the half in November? Or should I just start base building after the 5k for the half training and then start Pfitz's 11 week plan after that? I’m planning on using the 45-57 plan for the 10k and 46 to 60 for the half (will probably stay more in the 55-60 range). I would still run the 10k if that was the case (it’s a corporate challenge-type thing), but just not with specific 10k training.
PRs:
5k: 17:07 (3/30 of this year)
1/2: 1:22:54 (no specific training - 35 mpw for a few months, pace runs up to 6-7 miles, 14 mi long run max)
Full: 3:08:XX (fall of '17 - 50-60 mpw average, tempo runs, midweek MP runs up to 11 miles, longest run of 24 mi)
Tl;dr
1) Weaker in longer distances
2) Running 10k on 8/25 and half on 11/3
A - Specifically train for 10k and half on 8-9 weeks
B - Base build through 10k, and then 12 week training for half
C - Don’t overthink it