Trains run hourly from Belfast Great Victoria Street via Lanyon Place and other Belfast stations, Antrim (for International Airport), Ballymena and Coleraine, taking 90 min to Castlerock, then another 30 min to Londonderry. Change at Coleraine for trains to Ulster University and Portrush, and for buses along the Antrim coast to Bushmills, Giant's Causeway and Ballycastle.

55.165-6.7871 Castlerock railway station is in town centre close to the beach.

Ulsterbus 134 / 234 runs M-Sa every couple of hours or so from Coleraine along the coast road A2 to Castlerock (20 min), Magilligan crossroads, Aghanloo Cross and Limavady. The 234 continues to Ballykelly, Eglinton (for City of Derry Airport) and Londonderry.

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Map of Castlerock

Everything is within walking distance of the railway station.

• 55.17-6.7741 Barmouth is the breakwater channeling the outflow of the River Bann. The breakwater on the other side is at the end of Portstewart Strand but there's no river crossing.
• 55.155-6.78992 Hezlett House, 107 Sea Rd BT51 4TW, ☏ +44 28 7084-8728, downhilldemesne@nationaltrust.org.uk. Daily 10AM-5PM. Built around 1691, this thatched cottage is one of the oldest buildings in Ulster. (updated Jul 2021)
• 55.164-6.8123 Mussenden Temple and Downhill Demesne, Mussenden Rd, Castlerock BT51 4RP. Daily 10AM-5PM. Wacky ruined estate on a headland, built in the late 18th century for the Lord Bishop of Derry. It's within walking distance of the village but most visitors park on A2 either at Bishop's Gate (small but free) and walk up through the woods, or at Lion's Gate (charges) and enter via the Walled Garden, which is more accurately a walled lawn with toilets. On the headland you first reach the mausoleum to the bishop's brother, then the vast shell of the mansion: this was fire-damaged in 1851, restored, then abandoned and largely dismantled in the 1950s. (A visitor of 1812 reckoned he'd "never seen so bad a house occupy as much ground.") The temple teeters on the edge of a cliff, which has been stabilised to prevent it tumbling to the shore way below. It's modelled on Bramante's Tempietto in Rome, which is in turn based on the Temple of Vesta at Tivoli. Also nearby is a Belvedere. Lion's Gate parking £5, NT free. (updated Jul 2021)

• Castlerock Golf Club is on Circular Rd 200 yards northeast of the railway station. Blue tees are 6767 yards, par 73, visitor round £75.

• Costcutter on Main St is open daily 8AM-9PM.

• Bertha's Bar & Grill, 6 Sea Rd (north side of railway station), ☏ +44 28 7084-8888. Daily noon-11PM. Dog-friendly eating place and bar. (updated Jul 2021)
• Crusoes, 29 Sea Rd, ☏ +44 28 7084-9618. Daily 9AM-5PM. Cafe and fish & chips takeaway south side of railway station. (updated Jul 2021)
• The Village Kitchen has a takeaway (beside the butchers on Sea road) or a sit-in restaurant upstairs above the butchers
• the surf shack for coffees and watching the world go by
• the coffee hut on main street for cake and coffee
• See Bertha's above. Village Tavern is on the main road in Articlave 2 miles south of Castlerock.

• Castlerock Holiday Park next to the railway station normally offers camping and tourer caravan pitches. In 2021 it's only available for static caravan longs lets.
• Downhill Beachhouse, Mussenden Rd BT51 4RP (100 yards east of railway station), ☏ +44 28 7084-9077. Normally a hostel, but 2021 it's only available for exclusive self-catering lets. (updated May 2021)
• 55.154547-6.7870821 Carneety House, 120 Mussenden Rd BT51 4TX, ☏ +44 28 7084-8640. Friendly B&B on main road, handy for motorists. (updated May 2021)

As of May 2021, Castlerock has a 4G signal from all UK carriers, though coverage from Three is patchy at the edge of town. 5G has not reached this area.

• Derry is a must-see historic city, with its ancient walls intact.
• Portstewart east across the estuary has another fine beach.
• Coleraine has Ulster University. It's short of sights, but you go that way for Bushmills and Giant's Causeway along the Antrim coast.