Great Calva is a fell in the Lake District, England. It is in the Northern Fells, lying roughly at the centre of this region of high ground. As a result, it is distant from roads and quite remote by Lakeland standards. Great Calva stands at the head of a major geological fault running through the centre of the Lake District, and so from the summit it is possible to see all the way south over Thirlmere. The subsidiary summit of Little Calva lies to the west. It is in the centre of the Skiddaw Group SSSI.

1. Topography

Skiddaw and Blencathra are the best known of the Northern Fells, fronting the range as they loom above Keswick and the road to Penrith. Behind this wall is a further group of fells, commonly referred to as Back o' Skiddaw. This group is centred upon Knott and Great Calva is its southernmost top. To the south of Great Calva – at the centre of the Northern Fells – is Skiddaw Forest, a marshy upland area at around 1,300 feet (400 m) surrounded on all sides by higher fells. Three streams flow from Skiddaw Forest, dividing the Northern Fells into three sectors. Dash Beck runs north west, the River Caldew north east and the River Glenderaterra south. The three groups of fells can conveniently be thought of as the Skiddaw massif, the Blencathra group and Back O'Skiddaw. The single building in Skiddaw Forest is Skiddaw House which has variously seen service as a shepherds' bothy and a Youth Hostel. Great Calva appears from Skiddaw Forest as a steep sided pyramid, clad predominantly in heather. The summit is a curving ridge one-half-mile (800 m) long, with Great Calva at the eastern end and Little Calva to the west. The ridge itself is extremely wet underfoot. From between the two tops, Dead Beck runs down into Candleseaves Bog, the source of both the Caldew and Dash Beck. Great Calva has a prominent southern spur, around which the Caldew flows before steering north east for the Eden Valley. In a strict topographical sense Candleseaves Bog is the connection between Great Calva and Skiddaw, but it could hardly be described as a ridge route. Running north east from Little Calva is a ridge which drops to a col at 1,797 feet (548 m), before rising up the flanks of Knott. There are a couple of small tarns on the Great Calva side of the depression. From the col Wiley Gill runs south east to join the Caldew and Hause Gill flows westward to Dash Beck. Little Calva sends out a further descending ridge to the north west, running alongside Dash Beck. A series of spurs named Black Nettle Hause, Little Nettle Hause and White Hause drop toward the river. Between Black Nettle Hause and Birkett Edge on Bakestall the beck reaches Whitewater Dash, a fine series of waterfalls.

1. Summit

A cairn stands at the top of the south ridge with another a little to the north at the highest point. The remains of an old fence runs between the two. A few yards east of the summit a stone windshelter has been constructed. There is some rock in evidence but grass and heather predominate. The view southward, particularly from the lower cairn is unexpectedly good. Looking directly down the Glenderaterra Valley and the Vale of St John, the gap gives an unimpeded view as far as Loughrigg and Steel Fell. Additionally above the flanks of Lonscale Fell Great Gable and the Scafells appear. The nearer fells by contrast turn their backs upon Great Calva, the northward vista being less inspiring.

1. Ascents

Great Calva is mainly covered in heather, which makes walking relatively difficult. Approaching from the northwest, one can take the bridleway between Great Cockup and Little Calva from Orthwaite to reach the col between Knott and the summit. Alternatively, Great Calva can be climbed up the pathless south ridge from Skiddaw Forest, which creates a number of options for starting points. The Skiddaw House supply road follows Dash Beck up from Peter House Farm, or a good track runs alongside the Caldew from the road at Mosedale. Access is also possible up the Glenderaterra valley from the south, starting either from the Gale Road car park or the vicinity of Threlkeld.

1. References
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Skiddaw Group SSSI

Skiddaw Group SSSI is a site of special scientific interest in the Lake District High Fells, England. Its shape is approximately an irregular circle centred near Great Calva, with an area of 10,256.3 hectares (39.600 sq mi). The high ground creates a watershed between the Caldew Operational Catchment with water flowing north towards Carlisle, and the Ellen and West Coast and Derwent Operational Catchments flowing towards the west coast at Workington and Maryport. The area includes the Skiddaw Forest nature reserve. The SSSI is designated for its flora and fauna, and for its geology. The geology includes the Skiddaw Group of sedimentary rock formations, and the Caldbeck Fells former mining area. Fells above 2,000 feet (610 m) include High Pike, Carrock Fell, Knott, Great Calva, and Bowscale Fell. The highest peaks are in the Skiddaw area, including Skiddaw itself, Long Side, Carl Side, Little Man, Lonscale Fell and, further east, Blencathra. The SSSI is divided into a patchwork of "units" which are used as the level of geographic detail for reporting overall features and conditions. Each unit is identified by the Ordnance Survey grid reference at the centre of the unit, its area in hectares, the date it was last surveyed, and the drainage catchment it is located in. For example Bassenthwaite Common, which is unit 27, is nearly 700 ha (2.7 sq mi) centred at NY252299 in the Dash beck catchment. The habitat is there is dwarf shrub heath which, when surveyed in November 2010, was in an "unfavourable – recovering" condition.
1.6 km

Lake District High Fells

Lake District High Fells is a Special Area of Conservation (SAC) in Cumbria, England, which was designated in 2005. It is a multi-site SAC with an area of 27,003.07 ha (104.2594 sq mi) consisting of 10 separate sites including the summit of Scafell Pike, which at 977 m (3,205 ft) is the highest mountain in England. The SAC takes its name from the English Lake District and "Fell", the local word for a mountain. It protects 16 habitat types listed in the European Union's Habitats Directive. As is usual with SACs in England, the protected areas are also covered by Site of Special Scientific Interest (SSSI) designations. The ten component sites are as follows: Armboth Fells SSSI Birk Fell SSSI Buttermere Fells SSSI Helvellyn & Fairfield SSSI Honister Crag SSSI Pillar & Ennerdale Fells SSSI Scafell Pikes SSSI Shap Fells SSSI Skiddaw Group SSSI Wasdale Screes SSSI (Wast Water is a separate SAC protecting the lake) Additionally: River Derwent & Tributaries SSSI (overlaps the SAC) River Eden & Tributaries SSSI (overlaps the SAC)
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Knott, Caldbeck

Knott is a mountain in the northern part of the English Lake District. It is the highest point of the Back o'Skiddaw region, an area of wild and unfrequented moorland to the north of Skiddaw and Blencathra. Other tops in this region include High Pike, Carrock Fell and Great Calva. The fell's slopes are mostly smooth, gentle, and covered in grass, with a few deep ravines. It stands a long way from a road and requires a long walk across the moor top get to it; this, as well as the fact that it is hidden from the rest of the Lake District by the two aforementioned giants, make it one of the most unfrequented tops in the Lakes. When it is climbed it is most often from Mungrisdale or from the north via Great Sca Fell. The word Knott is of Cumbric origin, and means simply "hill".
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2.4 km

Bakestall

Bakestall is a fell in the English Lake District, it is situated seven kilometres (4+1⁄4 miles) north of Keswick in the quieter, even secluded northern sector of the national park known as ‘Back o’ Skiddaw’.