Thanks for having stuck with me through the three HARP 24 blogs covering my 2025 journey to 65 miles in 24 hours. In this final blog I want to dig a little deeper into the numbers and try and look at how we get from there to the ultimate goal, 100 miles in a day.
I don't have perfect information on this, but from the data I have from my Garmin plus the official splits I think we can piece it together pretty well. If we look at what I did across the 24 hours it looks something like this:
Running - 2 hours 40 minutes at 11:15 min miles covering 14 miles.
Walking - 15 hours at 17:30 min mules covering 51 miles.
Still - 30 minutes.
Off course - 4 hours 40 minutes.
Early finish - 1 hour 10 minutes.
Total time 24 hours.
Put into km's that is 11 min/km walking pace and 7min/km running. The walking I am happy with, the running looks a little slow but it is in the ball park of what I would have been doing. Maybe 6:40's when fresh and a little slower as I tired. My short runs as the race progressed will have been hard for the Garmin to pick up accurately.
The 30 minutes of still would have included some of the off course stuff in those early laps when I went for supplies etc, and would also include brief pauses at water stops for a refill. Later on I had some unscheduled rest stops as I pulled off the course to allow horse riders or faster runners to pass.
Off the course was in the main my two sleep stops. I have lap 8 at nearly 3 hours 10 minutes and lap 9 at 4 hours 20. 7 and a half hours for 2 laps, which would probably have been 3 hours on course so you've got something like 4.5 hours off course during the night.
I then bunked off early at 10:52 in the morning and so lost over an hour of move time there.
If we are looking for easy wins in our quest for greater distance than the 4 hours 40 minutes off course and 1 hour 10 minute early finish would be the first to go, throw in 10 minutes less still time and we have a nice even 6 hours. Even if I just walked all 6 of those hours we are covering an additional 20 miles as a minimum, taking our distance up to 85 miles.
85 miles feels pretty close to that 100 mile target, but 15 miles, over a half marathon is still a sizeable gap. The thing working in our favour is just how little time I spent running. Even with some generous rounding and bringing in some slow undetected shuffling we are struggling to get up to three hours.
As I said in my previous blogs I'm just not endurance ready at the minute. If I can change my marathon shape from 5 hours to 4 hours or even something better, that makes life so much easier, and would allow me to stretch out that run time further. But it needs to go out a decent amount. Changing sleeping to walking has a big impact, shifting 17:30 minute miles walking to 11:15 minute running much less so.
We are effectively adding 2 miles an hour for each hour of walking upgraded to an hour of running.
Just to show that 85 miles again, our new look 24 hours would look something like this:
2 hours 40 minutes at 11:15 min/miles - 14 miles
21 hours 50 minutes at 17:30 min/miles - 71 miles
30 minutes still/off course.
Total 85 miles.
At 2 miles an hour extra we are going to need to convert 7 hours of walking into 7 hours of running and our final 24 hour split to get to 100 would shake out like so:
10 hours running at 11:15 min/miles - 54 miles
13.5 hours walking at 17:30 min/miles - 46 miles
30 mins still/off course.
That final push to get over the top is a significant one. I can see a way to get to 16 laps and 80 miles just by losing the sleep completely and really being super efficient, it is that last 20% which is going to require me to get myself fit enough to be a runner, not a hiker/adventurer/explorer.
I'm struggling to wait a year to put this right, and have silly ideas of creating my own 24 hour event later this summer. I must be patient and wait to do it where it counts at HARP 24 in 2026.