A Maths lesson
50k = 32 miles (31.0686)
I completed London marathon in 4 hours 21 minutes this is 26.2 miles giving an average 10 minute (9.59 to be precise) miles.
6 miles in an hour
32 divided by 6 = 5.3 = 5 hours 20 minutes for 32 miles (keep up)
In reality I think the formula should be marathon time + an hour + tiredness = approx 7 hours
It could also be this marathon time + an hour + getting lost = 8 hours
However factor in this elevation
and the formula will be this VLM X 2 = tired Shaz. Just as well I have booked a day pass!