The well, known locally as Tobar Phádraig, measures just 3.1 metres by 1.2 metres, with an entrance facing south-east. Beneath its present walls, traces of an earlier and roughly circular structure are still visible, suggesting the site was already in use before whoever built the current enclosure arrived to tidy things up. About 75 metres to the west sits Leaba Phádraig, St Patrick's Bed, a recess cut into the hillside next to a modern altar. Scattered around the broader site are three further penitential stations, low drystone enclosures of varying sizes whose interiors are covered in small stones and pebbles left by pilgrims as part of the devotional rounds.

The well's reputation stretches back at least to 1684, when the historian and geographer Roderic O'Flaherty recorded it as a remedy for murrain, a catchall term for infectious disease in cattle. That detail was later cited by James Hardiman in his 1846 edition of O'Flaherty's work on the west of Ireland. The pairing of saint's well with livestock cure is not unusual in an Irish context, where holy wells frequently carried practical agricultural associations alongside their spiritual ones, but the specific written record gives Tobar Phádraig an unusually clear documentary trail for a site of this kind. Two oratories and a number of more recently built stations are also present, layering newer devotional structures over a much older pattern of use.

The site is still active. Pilgrims gather here on the last Sunday of July, a date that corresponds loosely with the wider tradition of Reek Sunday and Lúnasa-season pilgrimages observed across the west of Ireland. The penitential stations involve walking prescribed circuits and leaving stones, a practice known as making the rounds, and the accumulated pebbles inside the enclosures bear quiet witness to generations of those circuits being completed. The mountain pass itself adds something to the experience: Mám Éan is high, exposed, and genuinely remote, and arriving at the well after the climb gives the whole complex a geographical logic that is easy to feel even without knowing its history.