Ben Nevis in Scozia, Scafell Pike in Inghilterra, Snowdon in Galles: 37 chilometri, 3.000 metri di dislivello e 750 di guida. La sfida che ogni anno coinvolge decine di migliaia di persone (principessa compresa)

Catherine, 44, started the endurance event on Saturday night and finished it 24 hours later cheered on by her family including her husband and three children.

The princess tackled the challenge solo with support from Mountain Rescue teams along the route