Wanting to keep my writing realistic, I try to keep distances traveled in the humanely possible range.
The current setting is thus:
Medieval style world, roads available, they are travelling north, climate like Germany/Holland/Scandinavia
A group of mostly military (only one not-experienced rider among them) horsemen travelling as fast as they can because their life depends on it need to cross a windswept plain. About 12-15 persons plus horses.
They ride light (light armour) but heavily armed (everyone carries either one or two swords or a bow with full quiver and a shortsword, and an occasional axe or warhammer present).
They have pack-horses for supplies and enough mounts. Rations are simple dry rations for the men and oats for the horses. Water is available on the plain.
The not-experienced rider is a thin woman, but she is a magic healer (magic does come at a cost in the form of energy drains).
They are being followed and they know that. The windswept plain houses many nasties and you don’t want to be there for much longer than you need.
How far could they have traveled in two days and three nights, taking minimal breaks and only one longer rest due to extreme fatigue?