The North Down Coastal Path starts in Hollywood and the route takes you along the south shore of Belfast Lough, past many of the scenic, historical and ecological attractions of North Down, finishing in Groomsport. For the most part the path follows the grassy flats just above the shoreline and is well surfaced for almost all of its length.

https://walkni.com/walks/north-down-coastal-path/

The Lagan Towpath is an off road, public access route from Belfast to Lisburn which takes you along the river and canal system through a variety of wetland, riverside meadows and mixed woodland. 

https://walkni.com/walks/lagan-towpath/

Route PDF: https://walkni.com/wp-content/uploads/Lagan-Towpath-Leaflet.jpg

The Antrim Hills Way is a scenic 22-mile walking trail crossing some of the most scenic upland areas in the Antrim Coast and Glens AONB. It starts in the historic village of Glenarm, crosses Black Hill (381m), Scawt Hill (378m) and along Sallagh Braes, a semi-circular basalt escarpment. The highest point on the route is Agnew's Hill (474m) from where almost the entire Antrim Hills Way is visible. The trail continues over fields and, often wet, moorland to end at the solitary volcanic plug of Slemish Mountain.

The Moyle Way is a challenging route that explores the northern-most Glens of Antrim. Following a mixture of forest tracks and remote upland moor, the route includes a visit to the slopes of Trostan, Antrim’s highest summit at 550m. The mountain sections can be wet and rough underfoot, and full navigation skills are required in bad weather.