I have a marathon in 2 weeks which I hope to use as a Boston qualifier (3:10). But see, now I'm thinking I might be able to go for 3:00 based partly on those online race prediction calculators. So, give me your human opinion on whether I can actually do this.
This year my best 5K was 18:01 right at the beginning of the season. I have run two 15Ks this year, 59:23 and 59:15. I haven't run an open half marathon in a long time (which is why I'm not sure of my pace), but this year I ran a 1:32 off the bike in a half ironman.
I run 20-25 miles per week because I make time for swimming and biking too, but in the last couple weeks I ramped the running up to 35-40 miles. My longest single run is 20 miles, done once.
So do I go for broke and try to hit 3 hours, or will it result in a spectacular disaster?