Copper Mines

Overview

Tucked into the wooded shores of Ross Island, the Copper Mines are an atmospheric slice of history wrapped in an easy walk. You’re here for two things: the story of some of Europe’s earliest copper workings and the striking, blue‑green water of the flooded open pit known as the Blue Hole.

What You’ll See

Expect quiet forest paths, lakeshore views across Lough Leane, and remnants of old workings. The Blue Hole is the eye‑catcher—its unusual color comes from copper‑rich rocks around the flooded pit. In places along the shore you may spot green malachite or deep‑blue azurite in the rocks. It’s a look‑don’t‑touch kind of site: no swimming, no entering shafts, and no collecting.

The Walk

Start at Ross Castle and follow signs for Ross Island/Copper Mines. The loop is about 3 km and typically takes 40–60 minutes on mostly level paths. It’s straightforward and great for a low‑effort outing, but expect a few short, mucky stretches and occasional seasonal flooding on side paths.

Why It Matters

Mining on Ross Island began in the Early Bronze Age (roughly 2400–1900 BC), making these the earliest known copper mines in north‑western Europe. Later industrial attempts briefly revived the workings in the early 1800s (notably 1804–1810 and 1825–1829) before flooding and other issues shut things down for good.

Wildlife

Keep an eye out for Killarney’s native red deer in the woodlands and along the shore. Over the lake, watch for white‑tailed sea eagles cruising the thermals. Woodland birds and waterfowl are a constant backdrop year‑round.

Practicalities

Use the Ross Castle car parks (two lots, free, open 24/7). Toilets are by the castle near the seasonal café kiosk. There’s no water or services on Ross Island itself, so bring what you need and pack out all litter. Dogs must be on lead, drones aren’t permitted, and sticking to marked paths is the rule.

Make It a Bigger Outing

If you’ve got extra time, stitch the Copper Mines loop into the Governor’s Rock and Library Point paths for a longer wander and more lake viewpoints.

Best Time to Visit

Go early morning or late afternoon for quieter paths and softer light, especially when Ross Castle is busy. After heavy rain, expect puddles and possible flooding on some sections—waterproof footwear helps. From late spring through autumn, midges and ticks are a thing; bring repellent.