As for many cyclist the goal is to get to John o’Groats, not many of them take ferry further to Orkney. Usually people do it in separate trip, together with Shetland Islands.
NATIONAL CYCLING ROUTE #1 UK
The milestone of this part is Altnaharra. Either you go with other cyclists straight to Bettyhill, or with almost nobody to Tongue, how National Cycling Route 1 prescribes. All cyclists I’ve met told me that Altnaharra – Bettyhill was one of the best part on their way across UK. So I checked another route.