I thought it was 11 km and took 72 mins. No surprise you always thrash me at orienteering. What did Alice's Garmin think?
Alice had 6.38 miles ( which equals 10.27 K) and 72.42.
I took my time from Strava which was "moving time" - presumably accounting for stiles, looking at signs etc. but it does seem to imply quite a lot of rest.