WalkNI.com Your definitive guide to walking in Northern Ireland
Quality Walk

Castlewellan Forest Park - Slievenaslat Walk

This steep climb through the forest provides a series of viewpoints offering panoramic views of the Mourne Mountains and surrounding drumlin landscape of Co Down.




2.7 miles

OS Map

Sheet 29

Nearest Town


Route Shape


Route Type

Forest, Hill, Lakeland, Woodland


Strenuous including steep climbs

Grid Reference (Start)


Grid Reference (End)


Point of Interest

Views of the Mourne Mountains, Castlewellan Castle, lake and gardens

Area of Outstanding Natural Beauty


Route Description

Part of the new Castlewellan Walking Trails launched in November 2014, this trail is signposted from the Lakeside car park - follow the yellow waymarkers.

Starting at the Lakeside Car Park, follow the north side of the lake before starting the steep climb to the summit of Slievenaslat (272 metres).  Openings within the forest and the summit itself provide panoramic views of the Mourne Mountains and the drumlin landscape of Co.Down before commencing your descent.

The most strenuous walk in the Park, this trail is rocky in places with steep gradients and numerous steps both up and down. Variable and uneven trail surfaces are present including large loose material including rocks and roots.

This walk is situated in a working forest environment and may be subject to diversion and closure from time to time.

Up to date information is available on the Forest Service web site - link below.

Getting to the Start (by Public Transport)

Translink - journeyplanner.translink.co.uk

Getting to the Start (by Car)

From Castlewellan the forest is signposted from Main Street.

Accessibility Grade

Grade 5

Accessible Facilities

The following facilities are available for users with limited mobility:

Café (wheelchair accessible)
Disabled toilets
Disabled parking


Car park (fee charged), café, toilets (disabled access), picnic areas, The Peace Maze, Activity Centre, lecture room/ classroom, camping & caravaning, orienteering route, mountain bike trails.

Walk Location
Map of Northern Ireland
Image Gallery

Ratings and Comments

ewart 26 January, 2019 @ 16:18

Haven't walked to Slievenaslat for about 20 years, but the view over the Mournes and Dundrum Bay has always been spectacular and worth the effort. Thoroughly enjoyable.

Lisa Nelson 20 October, 2017 @ 14:11

A hidden gem with one of the best views of the Mournes I've seen – well worth the climb! The stone steps descending from the viewpoint added an interesting element to the route. I can’t recommend enough.

michaela rodgers 10 June, 2016 @ 14:59

the forest park is an extraordinary walk and it lovely and peaceful, and it is one of the most popular tourist attractions

Simon Wilson 29 March, 2016 @ 13:49

Great short walk (if you have limited time) -with stunning views about 1.5 hours from start to finish !

yvonne falls 25 July, 2015 @ 08:42

This is a lovely walk with fantastic views of the Mourne mountains.

Add Your Rating

Know a good walk that is not included on the site?

Suggest a Walk >