The waterfall is a classic example of a hanging valley, a landform where the valley floor is significantly higher than the main valley or sea level into which it flows.
The geology at the site features complexly folded and faulted shale and sandstone layers typical of the Hartland Quay area.
The water source for the fall is the Speke's Mill stream, which traverses the agricultural landscape before reaching the precipice.
The location is often used as a filming site for coastal scenes due to its dramatic, rugged appearance and lack of man-made infrastructure.
Speke's Mill Mouth is a dramatic waterfall located on the Hartland Peninsula, where the stream drops approximately 150 feet directly onto the rocky Atlantic coastline. The site is a key feature of the South West Coast Path, characterized by jagged carboniferous rock strata and vertical cliffs. The waterfall is formed by a hanging valley created by rapid coastal erosion outstripping the stream's downcutting. High tide can bring waves directly to the base of the waterfall, which is located at the end of a deep, steep-sided valley. The area is part of the North Devon Coast National Landscape and is a designated Site of Special Scientific Interest (SSSI). It remains accessible via cliff-top walking trails leading down to the beach level.
From the beach level looking up at the full height of the waterfall during low tide.
Wear sturdy, waterproof hiking boots with excellent grip, as the path down to the beach is steep, uneven, and can be slippery.
Check local tide tables before visiting, as the beach area at the base of the waterfall becomes submerged or difficult to navigate at high tide.
Bring a windbreaker, as the exposed cliff face is subject to strong Atlantic gusts regardless of the season.
Attempting to descend the cliff paths in wet or windy conditions, as the terrain becomes treacherous.
Leave no trace; remove all litter. Keep dogs on short leads near cliff edges and livestock-grazed areas.
