Cross-Fell The source of the River Tees. Cross Fell is the highest mountain in the Pennine Hills of Northern England and the highest point in England outside the Lake District. It is located in the North Pennines Area of Outstanding Natural Beauty. The summit, at 2,930 feet (893 m), is a stony plateau, part of a 7.8-mile-long (12.6-kilometre-long) ridge running north-west to south-east, which also incorporates Little Dun Fell at 2,762 feet (842 m) and Great Dun Fell at 2,785 feet (849 m).	North Pennines The North Pennines is the northernmost section of the Pennine range of hills which runs north–south through northern England. It lies between Carlisle to the west and Darlington to the east. It is bounded to the north by the Tyne Valley and to the south by the Stainmore Gap.	High Force High Force is a waterfall on the River Tees, near Middleton-in-Teesdale, Teesdale, County Durham, England.[1] The waterfall is within the North Pennines Area of Outstanding Natural Beauty (AONB) and European Geopark.	Low Force, Forest- in-Teesdale Low Force is an 18-foot (5.5m) high set of falls in the Tees Valley, England. Further upstream is the High Force waterfall.[1] Low Force is also the site of the Wynch Bridge, completed in 1830. It is suggested that only one person at a time should cross the bridge as it may be unstable. Low Force is within the North Pennines Area of Outstanding Natural Beauty (AONB) and European Geopark It was first descended[when?] on a standup paddleboard (SUP) by international SUP athlete Anthony Ing.