Discover the geology of Two Rock and Three Rock Mountains with UCD School of Earth Sciences. A complimentary bus will run from Carrickmines.

As places are limited, please only book if you are sure you can attend.

Our hike will begin at The GAP, then continue to Fairy Castle, descending via Three Rock to discuss the impact the last glaciation had on the Dublin Mountains. The hike will be led by Sam Kelley and Clara Crowell from UCD School of Earth Sciences and will be supported by the DMP Volunteer Rangers.

There are two booking options for this event:

1. Meet at Carrickmines LUAS Park & Ride at 09:30, where a complimentary bus will take you to GAP, Glencullen. After the hike, the bus will return to Carrickmines LUAS Park & Ride.

Please do not book the complimentary bus unless you are certain you will use it.

2. Meet at the GAP, Glencullen at 09:45, see Google Pin (https://scanner.topsec.com/?d=1942&r=show&u=https%3A%2F%2Fwww.google.com%2Fmaps%2Fdir%2FBallybrack%2BRd%2C%2BGlencullen%2C%2BDublin%2C%2BD18%2BY673%2F%4053.2229994%2C-6.3077888%2C17828m%2Fdata%3D%213m1%211e3%214m8%214m7%211m0%211m5%211m1%211s0x4867a7598d5ab551%3A0x28685bb73af18710%212m2%211d-6.2253887%212d53.2230278%3Fhl%3Den%26entry%3Dttu%26g_ep%3DEgoyMDI1MDkxNy4wIKXMDSoASAFQAw%253D%253D&t=a9d1dc3b6e25f9716bd44ea3931b473c418d61ed).

Date: Saturday 10th October.

Meeting point: The GAP, Glencullen, Co. Dublin at 09:45.

Duration: 4 hours approximately (starts at 10:00).

Distance: 8km approx.

Elevation Gain: 320m.

Degree of difficulty: Moderate.

Bring: Walking boots, rain gear, warm layers, water, lunch, hot drink and snacks.

Public Transport: LUAS Green Line serves Carrickmines Park & Ride from where there will be a free bus transfer to the GAP, Glencullen.

Parking: The GAP Glencullen, note there is a €2 parking fee.

Note – no dogs allowed at this event.

Please inform us privately of any health issues on the day and ensure you bring any necessary medication with you.

In the event of an orange or red weather warning, this event will be cancelled. Other weather warnings will be assessed on a case-by-case basis.

This free event is part of the 2026 Dublin Mountains Festival ~ Féile na Sléibhte, which runs from October 1st to 10th and features a mix of walks, and events celebrating the Dublin Mountains in a sustainable and engaging way. Find out more at dublinmountains.ie (https://scanner.topsec.com/?d=1942&r=show&u=http%3A%2F%2Fdublinmountains.ie&t=12830cc0924d9c8f97828ef3a0d6b01b04fb0286).

Description supplied by the event organiser.