Our trip was overrun by a huge coachful of OAPs, who, whilst lovely, did manage to monopolise the boat a bit, which was initially a bit off-putting. The guides cleverly split them into a separate group once we got to the reserve though, so they travelled up to the peak ahead of us (and most travelled back down the same way rather than doing the walk). The walk down from the Head is pretty rocky and whilst easy for us (in our 30s) could be considered a bit more difficult for older travellers or anyone with dodgy knees or ankles. That said, the more 'difficult' bits are the 2 offshoots from the main trail - up to the needlepoint and then down into the sea caves - so you could bypass these to make the trail easier. It really is the best part of the trip so it'd be a shame not to do it.
I did the walk in flip-flops, which was largely OK, but would definitely have been easier and more comfortable in trainers or walking shoes/boots.
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