I did the Snowdon Race for the 4th time this year and completed it in 1hr 55. I thought my training had gone pretty well and was disappointed with my time - I seriously thought I could get in under 1'50. I'm sure the heat accounted for some time but probably only 2-3 minutes. My question is this - how much better can I hope to get - I was training about 30 miles/week with a quality speedwork session and a decent tempo run and also adding in a couple of cross training sessions on bike/stepper. If I doubled this mileage - and kept the quality sessions up, what could I hope for - a couple of minutes, or a more substantial reduction? Any thoughts are appreciated.