Sliabh an Iarainn summit and Mass Rock loop

Hiking trails & Routes

Ireland

Leitrim

Sliabh an Iarainn summit and Mass Rock loop

Moderate

hikers

Sliabh an Iarainn summit and Mass Rock loop

01:47

5.42km

300m

Hiking

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: July 22, 2026

Tips

Includes an off-grid segment

Navigation instructions may be limited.

After 1.73 km for 1.33 km

Waypoints

Start point

Parking

Get Directions

1.35 km

Sliabh an Iarainn Trail

Highlight • Trail

The trail and loop to the Mass Rock is reasonably good underfoot and fairly obvious. If you want to continue up the hill to the Sliabh An Iarainn summit, it's best to leave the main track here and head uphill on rougher and less obvious trails. There is a summit marker stone and the 360-degree views are spectacular.

Tip by

2.37 km

Iron Mountain

Highlight • Summit

Sliabh an Iarainn, the Iron Mountain, imposes itself impressively on the surrounding landscapes. Its summit is less spectacular than its great east-facing escarpment and is much less visited than Mass Rock, a stunning rock feature within its ramparts. Clear trails provide the approach, though any continuation to the summit is pathless and requires navigational nous.

Tip by

3.87 km

Mass Rock

Highlight • Historical Site

Mass Rocks were used as altars during the Penal Laws in the 1700s. The priest and congregation could perform mass here without fear of the redcoats or peelers surprising them.

The position behind a rocky pillar and below the cliff is an awesome place to discover.

Tip by

5.42 km

End point

Parking

Way Types & Surfaces

Way Types

2.39 km

1.62 km

1.27 km

120 m

Surfaces

3.34 km