Mark (& Missy, of course) gave us the best experience we could ask for on a day the weather was against us. He was fun, funny, knowledgeable, and very patient with the whole group. If you're interested in something not too far outside of Dublin 'city centre' that combines a little lore with a good few hours outside, this is a great option. If you're "a hiker," do know that the hike itself is about half the excursion (but the whole of it is surely worthwhile!); if you're an apprehensive not-so-much-a-hiker (as my husband was), this should be pretty manageable overall and there's really just one stretch towards the end that is a bit trying. Mark was excellent with pacing and giving everyone breaks (& laughs!) along the way. Definitely do check the weather, though -- Mark can't control it, Howth is colder than the city centre, the rain in winter months can feel brutal, and you'll want to dress appropriately. Layers and a fresh pair of socks will do you just right to enjoy a pint (or few) with him and the group at the end.