Drinnahilly

Standing at 704 metres, this Mourne Mountain peak delivers one of the finest views in County Down without the crowds that swarm nearby Slieve Donard. The climb from Newcastle takes about two hours through proper mountain terrain - rocky underfoot with some scrambling near the summit that'll test casual walkers.

Experienced hikers will love the challenge and the reward. From the top, the entire Mourne range spreads out before you, with the Irish Sea glittering beyond Newcastle and the Mournes' famous granite tors dotting the landscape like ancient sentinels. On clear days, you can spot the Isle of Man.

Families with young children should think twice - this isn't a gentle stroll. The path can be unclear in places and the weather changes fast up here. Come prepared with proper boots and waterproofs even on sunny days.

Campers staying at nearby Tollymore Forest Park or Windsor Holiday Park will find this makes a cracking day out for serious walkers. The mountain offers free access year-round, though winter conditions can be treacherous. Allow a full day including travel time from your base - the descent takes nearly as long as going up, and your legs will definitely know about it the next morning.