Castle Crag

The Castle Crag walk proves that the smallest of the 214 Wainwrights can deliver one of the biggest rewards in the Lake District. At just 290 metres — the only Wainwright under 1,000 feet — this rugged little rock peak rises from the wooded jaws of Borrowdale like a natural fortress, and its summit hands you a view down Derwentwater to Skiddaw that Alfred Wainwright rated among the very finest in the valley. This circular from Rosthwaite is a gem of a half-day: a gentle riverside approach beside the crystal River Derwent through the ancient oakwoods of the Borrowdale temperate rainforest, then a dramatic final climb up a zig-zag path carved through slate spoil heaps, past a cave once lived in by an eccentric 'Professor of Adventure'. The summit itself is a poignant place, given to the nation as a First World War memorial. Small in stature but huge in character, Castle Crag is the perfect low-level fell for a shorter day, for families with older children, or for a memorable finale to any Wainwright round.

The Castle Crag walk at a glance

The Castle Crag walk is proof that the smallest hills can leave the biggest impression. At just 290 metres, Castle Crag is the only one of Alfred Wainwright's 214 fells under 1,000 feet — and yet it packs in more character per metre than almost anything else in the Lake District. Rising from the wooded jaws of Borrowdale like a natural fortress, this rugged little rock peak offers a riverside amble through temperate rainforest, an atmospheric quarry cave once home to an eccentric hermit, a dramatic slate-spoil climb, and a poignant war-memorial summit with one of the finest views down Derwentwater in the entire valley.

Starting from Rosthwaite, the circular is a perfect half-day of around 5.8 km (3.6 miles). It suits families with steady older children, walkers seeking a shorter day when cloud sits on the high fells, and Wainwright baggers wanting a memorable, characterful tick. Below you'll find the practical detail — parking, transport, history and refreshment — that turns a good walk into a great one.

Getting to Rosthwaite: parking and the Borrowdale bus

By car, the walk begins at the National Trust car park at Rosthwaite (postcode CA12 5XB), tucked in the heart of Borrowdale a short drive south of Keswick along the B5289. It's a popular hub for Borrowdale walks and fills early on fine days; there's an overflow field in peak season, but arriving before mid-morning is wise. Limited alternative parking exists at Grange-in-Borrowdale, a little further north.

By public transport, Castle Crag is one of the most accessible Wainwrights of all. The 78 Borrowdale bus runs frequently from Keswick through Rosthwaite and on to Seatoller, making a completely car-free day genuinely easy — and letting you enjoy a post-walk pint without worrying about driving the narrow valley road afterwards. From Rosthwaite, follow the lane and path west towards the River Derwent to begin the circuit.

Borrowdale's temperate rainforest: the riverside approach

The walk's gentle opening is a delight in its own right. After crossing the clear, shallow River Derwent, the path follows the wooded bank upstream through the Borrowdale oakwoods — one of England's rare surviving fragments of Atlantic temperate rainforest. These mossy, lichen-draped woods thrive on the valley's high rainfall and clean air, supporting ferns, liverworts and rare plants found in few other places in the country. Pebble beaches and quiet pools line the river, tempting a paddle or, for the hardy, a bracing wild swim on the return.

Ahead, the quarried flank of Castle Crag looms unmistakably, its grey slate scar signalling the industrial history that shaped this fell. The path leads on towards Low Hows Wood at the foot of the crag, where the real climbing begins.

Millican Dalton's cave: the 'Professor of Adventure'

Part-way up the fell's western flank lie the caves of Millican Dalton, a set of old slate-quarry chambers with a wonderful story attached. In the 1920s and 30s, Millican Dalton — a Cumberland-born insurance clerk who abandoned London life to live simply outdoors — spent his summers camping in these caverns, styling himself the "Professor of Adventure" and guiding visitors on climbing and rafting expeditions. He made his own clothes and tents, lived largely off the land, and carved into the rock the phrase walkers still seek out today: "Don't waste words, jump to conclusions."

You can explore the two-tier cave (a torch helps), but take care: the ground around the workings is loose and unfenced, so keep children and dogs close and don't venture into unstable tunnels. It is one of Borrowdale's most atmospheric hidden corners and a genuine highlight of the walk.

The slate ascent and the war-memorial summit

The finale is short but surprisingly stiff. The path zig-zags steeply up through vast slate spoil heaps — the shattered grey debris of centuries of quarrying — on a climb that feels far more mountainous than the modest height suggests. The loose slate can be slippery, especially when wet, so follow the engineered path rather than cutting corners.

The summit is one of the most moving tops in the Lakes. It was gifted to the National Trust in 1920 as a memorial to the men of Borrowdale who fell in the First World War, and a plaque set into the rock records the dedication. The reward is out of all proportion to the effort: north, the length of Derwentwater draws the eye to Keswick and the great whaleback of Skiddaw; south, the rugged fells crowd the head of Borrowdale. Wainwright rated it one of the finest viewpoints in the valley, and few who climb it disagree.

Combining Castle Crag with other Borrowdale walks

Castle Crag's low height makes it the perfect bad-weather Wainwright — a rewarding outing when the higher tops are lost in cloud. It also links naturally into longer Borrowdale days: continue along the Derwent to the pretty hamlet of Grange, extend onto the wider Borrowdale valley paths, or use it as a gentle finale to a bigger round. Nearby Keswick and Derwentwater open up a wealth of further walking, from lakeshore strolls to the high fells of Skiddaw and Blencathra.

If you're working through the fells, browse our full Wainwright walks collection to plan your next summit — Castle Crag is a wonderful, low-stress way to add to the tally. And if waterfalls and gorges appeal, the western valley of Eskdale hides our dramatic Stanley Ghyll Force walk a short drive south.

Where to eat, drink and stay in Borrowdale

Rosthwaite has the welcoming Flock-In tearoom at Yew Tree Farm plus public toilets, while Grange-in-Borrowdale has a well-loved café by the bridge. For a fuller choice of pubs, restaurants, shops and accommodation, Keswick is a short drive north and makes an excellent base for exploring the whole northern Lake District. Borrowdale itself offers characterful inns, campsites and guesthouses for those wanting to wake up beneath the fells.

Castle Crag walk: final tips for a memorable day

Don't underestimate this little fell. Sturdy boots with good grip are essential for the loose slate zig-zags, which become genuinely slippery when wet and can ice up in winter. Take a torch to explore Millican Dalton's cave, keep everyone on the main path around the unfenced quarry workings, and pack a towel if you fancy a cold-water dip in the Derwent on the way back.

Above all, give the summit the time it deserves — read the memorial, drink in the Derwentwater view, and reflect on why Wainwright chose to honour so small a hill. The Castle Crag circular from Rosthwaite proves, better than any other walk in the district, that a great fell is measured in character, not height.

Castle Crag is a superb all-year, all-weather walk and a brilliant choice when cloud sits on the higher fells — the summit is low enough to stay clear on many a dull day. Autumn is glorious, with the Borrowdale oakwoods turning gold and the light low over Derwentwater. Spring brings fresh green and quieter paths, while warm summer days tempt walkers into the river pools on the return. Even in winter it's a rewarding short outing, though the slate zig-zags can be icy — take extra care on the steep descent.