The UTMB organisation suggests that 100m of vert is about the equivalent of running 1km on the flat
Not sure about that as it so depends on what the nature of the climb it and the terrain but handy enough guesstimate I suppose
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Even without the other complexities of terrains gradients, muscles etc., the most simplistic case has a huge variation depending on simple running economy, the vertical part - going up against gravity - is the same (per kg) for everyone, but the forward is not.
Two same weight people might be running 1km flat in 50 or 100 kJ now also add the fixed 75kJ to climb 100m, one is going to use 175% of the flat energy and one is only going to use 250%, completely different - those are extreme efficiency differences but people do have a wide range of efficiencies.
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Did I say it was just a bit of fun 
Interestingly 10:1 ratio gives a very similar ranking to me just eyeballing it. If I add a downhill 50:1 factor it fully agrees. With all the caveats stated above of course.
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Iād recommend listening to James Elsonās podcast on Arc. Now UTMB have taken over it seems to be more chaotic. He does critic it in an eloquent way and tbh you do have the experience to complete it . But it does sound like some of the organisation can be better . And not letting the number of entrants go up any more , than it already is .
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I think his comments were generally good and accurate. Heās applying a big helping of bravado though with āthe conditions werenāt anything out of the normā, they most definitely were.
It was also hypocritical to say that the conditions werenāt particularly tough and then go on to moan about how many sets of feet in the race are tearing up the path beyond recognition (which is true).
Also, way too much defence of āFerg and Janeā, his good mates. He acts as if there was a gun to their head to sell to UTMB and then he gives it āthey are just doing what they are told toā line.
Agree with him about numbers and the fact that the start and finish are no longer fir for purpose.
He wants the penny and the bun with this podcast.
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Wow, the Barkleyās have started or imminent 
This is early isnāt it?
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Really early!
Trying to make it harder to finish perhaps?
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Slightly different start place as well apparently as thereās building work going on near the famous yellow gate.
Itās chilly especially with the recent cold spell in the US, and Iād guess at least an hour less of daylight, maybe more for a late March race.
Not sure whoās running though.
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I did get the impression last year that Laz was getting increasingly pissed off at the increased hoopla and āhangers onā around the race. Seems to have increased since Jasminās finish.
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Iām thinking about doing āRace to the Stonesā 50km think its on the Sunday.
Baby Ultra really, not much elevation (which would kill my legs if there was significant down hills) but Im wondering if I could recover for Outlaw middle two weeks later. Three weeks Im sure would be fine but two.
I could treat both as IM training (expensive training days 
but get to try stuff under pressure i guess.)
I know myself, Iāll probably end with race day mentality and going too hard. The fitter I am the quicker I recover, so its hard to know atm with slowly improving fitness.
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Treat it as training and I think youād be fine mate.
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I think you can do Saturday or Sunday for the 50k. At least that used to be the case.
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Thatās a good point 
I guess that is the thing I am struggling with, can I be disciplined and controlled.
I am in training, but go to an event and a switch flicks and its all in.
I think if I do enter I need to really enforce the long game mentality, it is a learning experience and training, not a race.
Itās not always easy for sure. Having said that, I seem to suffer with the opposite problem. 
Think so.
That is okay then Iāll do both (Sat & Sun) 
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Just as well go straight through and do the 100km then
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Work colleague is doing it. (100km)
It is what reminded me I keep looking at it. Yeah, but lovely sleep between 2x 50kms 
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Not so much. It will probably be hot, pretty noisy and getting going again the next day can be tough.
Unless youāre one of those freaks that actually likes camping? 
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You are right, after tightening up, it would be grim the following day, better from mental clarity point of view but not physically.
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