Nice! Was that a mixed pair? I remember a couple camped next to me a couple of years ago when I was riding solo did really well. If it wasn’t you then ignore me! (but still impressed)
Most of my long rides have been on the road – I used to be quite into long tours and audaxes, so the longest I’ve done in a day probably would have been a 300k audax (180 miles ish I think). I mostly used to do 200s though, much less silly.
Much more tiring was a spur-of-the-moment 100 mile round trip to see a glacier that was way off my planned route on a Norwegian tour, with full luggage. That was, in hindsight, a bit foolhardy (ended up with ice in my shoe and losing a few toenails)
When I was a student in Plymouth I used to ride home to Bristol for the weekend a few times, over Dartmoor to Exeter then up the old A38. I think it was around 130 miles by that route. I used to be able to do it in a bit over 8 hours on a good day – doubt I could now though.
I don’t know how people manage to do those sort of distances day after day after day, at race speed.
Off road I don’t think I’ve done more than 60 in a day (but I’m usually on one wheel for that…)
Rob