Collon Hill [Castletimon Hill]

About Collon Hill [Castletimon Hill]

Rising above the village of Barndarrig, this coastal Marilyn serves as a prominent vantage point overlooking the Irish Sea. While modest in height, its isolation ensures panoramic views from the summit trig pillar, stretching across the sweeping sands of Brittas Bay toward the higher interior peaks of the Wicklow Mountains.

Key Statistics

Find It

Did You Know?

• •The hill is frequently referred to as Castletimon Hill, taking its name from the surrounding townland. The name likely derives from the Irish 'Caiseal Tiomáin', referring to an ancient stone fort or enclosure once located in the vicinity.
• •The summit provides a clear sightline across the coastal lowlands; look west to identify the massive bulk of Lugnaquilla and the profile of Croghan Moira, while the coastline stretches north toward the lighthouse at Wicklow Head.
• •Just north of the lower slopes lies the Castletimon Ogham Stone, a 5th-century monument inscribed with early Irish script, suggesting this coastal ridge has served as a landmark for over fifteen hundred years.
• •Despite its modest height of 239 metres, the hill is classified as a Marilyn because it drops significantly on all sides, giving it a relative prominence of over 150 metres.
• •The ascent is brief enough that you can be back in Barndarrig before your boots have even had a chance to get properly acquainted with the local mud.