Hellgill Force is a small but impressive waterfall situated where Hell Gill Beck transitions into the infant River Eden, just inside the Cumbrian border between Garsdale Head and the Mallerstang Valley.

The fall drops approximately 8 metres in a single plunge, making it a notable feature despite its modest scale.

The name "Hell" is thought to derive from Hel or Hela, the Norse goddess of the underworld, reflecting the Viking heritage embedded in Mallerstang's place names — words such as fell, gill, mire, and tarn all have Norse origins.

The waterfall is accessible from the road, lying only around 250 metres away. Nearby Ais Gill Summit marks the highest point of the Settle to Carlisle Railway, adding further interest to the surrounding landscape.