They are all fairly easy terrain, nothing like the hike to the fossil beach cache! Most of them are just off the forest paths which are well made in the case of the aerially caches. There is one that you can't ride a bike to (the cuckoo's nest) but the rest of those are all reasonably flat with gentle inclines. The caches with group names ie The Cure, Duran Duran, U2 are on or just off good forest paths too again mostly on the level. I have only done a few of the caches in the middle section ie The Sprawl, Stumped, Offside etc. These are more widely spaced so will take longer to do but the cache setter for those did them on his mountain bike. There are some caches around Chanonry Point where you can watch dolphins from but the sightings are becoming less this time of year. The best time to see them is usually a couple of hours after low tide but at the moment sightings are a lot lower as the dolphins are out to sea following the fish. We had an event at Chanonry last Christmas called the Last of the Mince Pies and these caches were set by Cakes R Us, so there are some which are cache & dashes and others which need a short walk, nothing too strenuous. There is also a series of caches in Taindore Woods on the Black Isle set by GerryU2 which start TW1, TW2 etc. These are a more up & down type of walk through a pleasant wood with views across the Beauly firth and Inverness. If you want some devious cache & dashes you should check out Ujax, his caches are usually very difficult to find and hidden in devious ways that'll have you scratching your head. They are mostly around Culloden Inverness. We found Third Time Lucky, Luck, Clava Bridge last week - some easy, some took a while!