# List of Sites of Special Scientific Interest in North Yorkshire

This is a list of the Sites of Special Scientific Interest (SSSIs) in North Yorkshire, England, United Kingdom. In England the body responsible for designating SSSIs is Natural England, which chooses a site because of its fauna, flora, geological or physiographical features. As of 2006, there are 241 sites designated within this Area of Search. 162 sites have been designated due to their biological interest, 56 due to their geological interest, and 23 for both.
Natural England took over the role of designating and managing SSSIs from English Nature in October 2006 when it was formed from the amalgamation of English Nature, parts of the Countryside Agency and the Rural Development Service. Natural England, like its predecessor, uses the 1974–1996 county system and as such the same approach is followed here, rather than, for example, merging all Yorkshire sites into a single list. Some sites you may expect to find here could therefore be in the Cleveland list.
For other counties, see List of SSSIs by Area of Search. The data in the table is taken from Natural England's website in the form of citation sheets for each SSSI.

## Sites

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* Y
| Site name | Reason for designation | Reason for designation | Area | Area | Grid reference | Year in which notified | Map | Citation |
| Site name | Biological interest | Geological interest | Hectares | Acres | Grid reference | Year in which notified | Map | Citation |
| Acaster South Ings | Y | | 38.3 | 94.6 | SE594437 | 1988 | Map | |
| Angram Bottoms | Y | | 9.8 | 24.2 | NY891999 | 1989 | Map | |
| Arkengarthdale Gunnerside and Reeth Moors | Y | | 7,634.7 | 18,865.4 | NY935070 & SD970990 | 1998 | Map | |
| Arkle Beck Meadows, Whaw | Y | | 8.4 | 20.8 | NY984041 | 1986 | Map | |
| Arnecliff and Park Hole Woods | Y | | 52.5 | 129.7 | NZ787048 | 2000 | Map | |
| Ashberry and Reins Wood | Y | | 97.7 | 241.5 | SE565850 | 1960 | Map | |
| Ashes Pasture and Meadows | | Y | 14.3 | 34.3 | SD776785 | 1983 | Map | |
| Askham Bog | Y | Y | 44.7 | 110.7 | SE570480 | 1961 | Map | |
| Askrigg Bottoms | Y | Y | 2.8 | 6.9 | SD948903 | 1984 | Map | |
| Attermire | Y | | 57.5 | 142.1 | SD842637 | 1955 | Map | |
| Aubert Ings | Y | | 10.6 | 26.3 | SE453538 | 1984 | Map | |
| Austwick and Lawkland Mosses | Y | | 83.6 | 206.6 | SD762665 | 1958 | Map | |
| Aysgarth | | Y | 18.3 | 45.1 | SE008886 – SE021888 | 1992 | Map | |
| Bastow Wood | Y | | 52.0 | 128.6 | SD990657 | 1975 | Map | |
| Beck Dale Meadow | Y | | 2.2 | 5.4 | SE767659 | 2002 | Map | |
| Beck Hole | Y | | 70.5 | 174.2 | NZ825020 | 1960 | Map | |
| Bellerby Fields | Y | | 2.8 | 6.9 | SE114932 | 1994 | Map | |
| Betton Farm Quarries | | Y | 2.3 | 5.6 | TA002856 | 1954 | Map | |
| Biller Howe Dale | Y | | 85.0 | 210.1 | NZ918013 | 1983 | Map | |
| Birkham Wood | Y | | 28.2 | 69.6 | SE359551 | 1988 | Map | |
| Birks Fell Caves | | Y | 85.5 | 211.2 | SD935765 | 1989 | Map | |
| Birkwith Caves and Fell | Y | Y | 178.4 | 440.8 | SD806766 | 1988 | Map | |
| Bishop Monkton Ings | Y | | 38.8 | 95.9 | SE344659 | 1986 | Map | |
| Black Keld Catchment | | Y | 1401.3 | 3461.2 | SE010700 | 1999 | Map | |
| Black Scar Quarry | | Y | 1.1 | 2.8 | NZ231052 | 1992 | Map | |
| Blaiskey Bank Springs | Y | | 1.4 | 3.5 | SE625887 | 1989 | Map | |
| Bolton Percy Ings | Y | | 7.1 | 17.5 | SE534401 | 1991 | Map | |
| Boreham Cave | | Y | 159.4 | 393.9 | SD926732 | 1986 | Map | |
| Botton Head | | Y | 5.1 | 12.6 | NZ596020 | 1984 | Map | |
| Brants Gill Catchment | | Y | 493.2 | 1218.2 | SD823733, SD825717 & SD850700 | 1986 | Map | |
| Breighton Meadows | Y | | 37.4 | 90.6 | SE704330 | 1986 | Map | |
| Bride Stones | Y | Y | 120.5 | 297.7 | SE873910 | 1952 | Map | |
| Brimham Rocks | Y | | 162.7 | 402.0 | SE212647 | 1958 | Map | |
| Brockadale | Y | | 58.3 | 144.0 | SE503174 | 1961 | Map | |
| Broughton Bank | | Y | 4.6 | 11.3 | NZ568035 | 1981 | Map | |
| Bull Ings | Y | | 3.0 | 7.5 | SE753880 | 1983 | Map | |
| Burr Closes, Selby | Y | | 1.3 | 3.1 | SE596340 | 1984 | Map | |
| Burton Leonard Lime Quarry | Y | | 3.3 | 8.2 | SE323630 | 1958 | Map | |
| Castle Hill Wood | Y | | 5.7 | 11.1 | SE585831 | 1983 | Map | |
| Castlebeck and Scar Woods | Y | | 36.6 | 90.5 | SE947974 | 1954 | Map | |
| Cawthorn Moor | Y | | 38.3 | 94.6 | SE781923 | 1990 | Map | |
| Caydale | Y | | 163.6 | 404.2 | SE530870 | 2004 | Map | |
| Cayton, Cornelian and South Bays | Y | | 169.8 | 419.5 | TA600860 | 1984 | Map | |
| Chris's Pasture | Y | | 3.8 | 9.4 | SD964890 | 1991 | Map | |
| Church Ings | Y | | 6.7 | 16.5 | SD594456 | 1991 | Map | |
| Cliff Beck Meadow, Buttertubs | Y | | 1.5 | 3.7 | SD880967 | 1986 | Map | |
| Cliff Force Cave | | Y | 70.9 | 175.4 | SD875960 | 1998 | Map | |
| Cliff Ridge | | Y | 2.6 | 6.4 | NZ575116 | 1988 | Map | |
| Clints Quarry | | Y | 1.0 | 2.5 | SD967575 | 1955 | Map | |
| Cockerham Meadows, Thorpe | Y | | 2.5 | 6.2 | SD998616 | 1987 | Map | |
| Cocket Moss | Y | | 20.0 | 50.0 | SD787618 | 1955 | Map | |
| Cockrah Wood | Y | | 11.9 | 29.4 | SE970882 | 1950 | Map | |
| Conistone Old Pasture | Y | Y | 297.2 | 734.4 | SD990670 | 1955 | Map | |
| Cow Cliff Pasture and Quarry | Y | | 1.3 | 3.3 | SE856669 | 1984 | Map | |
| Cow Myers | Y | | 15.2 | 37.5 | SE270730 | 1983 | Map | |
| Cracoe Reef Knolls | | Y | 141.1 | 348.6 | SD988603, SD996609, SE003608, SE007615, SE015614 & SE026618 | 1952 | Map | |
| Cropton Banks and Howlgate Head Woods | Y | | 42.2 | 104.3 | SE745875 | 1985 | Map | |
| Dalby Bush Fen | Y | | 7.4 | 18.3 | SE645715 | 1988 | Map | |
| Deepdale Meadows, Langstrothdale | Y | | 12.8 | 31.6 | SD889797 | 1988 | Map | |
| Derwent Ings | Y | | 662.4 | 1,636.9 | SE703466 – SE703347 | 1975 | Map | |
| Dow Cave System | | Y | 79.4 | 196.2 | SD989735 | 1987 | Map | |
| Duncombe Park | Y | | 117.8 | 291.2 | SE607828 | 1985 | Map | |
| East Heslerton Brow | Y | | 40.7 | 100.6 | SE926757 | 1954 | Map | |
| East Keswick Fitts | Y | | 12.0 | 29.6 | SE352460 | 1989 | Map | |
| East Nidderdale Moors (Flamstone Pin - High Ruckles) | Y | | 10,776.9 | 26,619.1 | SE112854 – SE177665 | 1996 | Map | |
| Eller's Wood and Sand Dale | Y | | 8.9 | 21.9 | SE856848 | 1983 | Map | |
| Ellerburn Bank | Y | | 2.9 | 7.2 | SE853848 | 1983 | Map | |
| Eskamhorn Meadows | Y | | 13.7 | 33.8 | SE679242 | 2010 | Map | |
| Fairy Call Beck | | Y | 1.8 | 4.5 | SE711903 | 1992 | Map | |
| Far Mains and Far Limekiln Close Meadows | Y | | 2.1 | 5.1 | SD992628 | 1986 | Map | |
| Farndale | Y | | 157.3 | 388.8 | SE670963 | 1987 | Map | |
| Farnham Mires | Y | | 10.2 | 25.1 | SE338605 | 1954 | Map | |
| Feetham Holme | Y | | 3.2 | 7.8 | SD994977 | 1984 | Map | |
| Filey Brigg | Y | | 27.9 | 68.9 | TA126816 | 1985 | Map | |
| Foredale | | Y | 1.6 | 4.0 | SD803700 | 1990 | Map | |
| Forlorn Hope Meadow | Y | | 1.6 | 4.0 | SE543171 | 1991 | Map | |
| Fothering Holme | Y | | 10.3 | 25.5 | NY991040 | 1989 | Map | |
| Freeholders Wood | Y | | 14.0 | 34.6 | SE013889 | 1988 | Map | |
| Fulford Ings | Y | | 12.7 | 31.3 | SE608491 | 1991 | Map | |
| Giggleswick Scar and Kinsey Cave | Y | Y | 40.1 | 99.1 | SD876665 – SD802657 | 1958 | Map | |
| Gingerfields | Y | | 6.9 | 17.0 | NZ162025 & NZ167022 | 1991 | Map | |
| Golden Hill Pit | | Y | 0.7 | 1.7 | SE724827 | 1990 | Map | |
| Gormire | Y | | 54.0 | 133.5 | SE505834 | 1954 | Map | |
| Gouthwaite Reservoir | Y | | 147.7 | 365.0 | SE129693 | 1969 | Map | |
| Gowerdale Windy Pits/Peak Scar | Y | Y | 4.7 | 11.6 | SE518889, SE526885 & SE529883 | 1960 | Map | |
| Grass Wood | Y | | 88.0 | 217.5 | SD985655 | 1955 | Map | |
| Grassington Hospital Grounds | Y | | 5.0 | 12.4 | SE017635 | 1988 | Map | |
| Great Almscliff Crag | | Y | 7.9 | 19.4 | SE268490 | 1987 | Map | |
| Green Lane Pit | | Y | 1.1 | 2.6 | SE732837 | 1988 | Map | |
| Greenfield Meadow | Y | | 15.1 | 37.3 | SD833794 | 1985 | Map | |
| Greenhow Pasture | Y | | 7.2 | 17.8 | SE118640 | 1983 | Map | |
| Greenhow Quarry | | Y | 2.7 | 6.6 | SE113639 | 1992 | Map | |
| Gristhorpe Bay and Red Cliff | Y | | 54.4 | 134.4 | TA085840 | 1954 | Map | |
| Hack Fall Wood | Y | | 42.4 | 104.7 | SE235772 | 1989 | Map | |
| Hackness Head Quarry | | Y | 3.0 | 7.4 | SE965904 | 1954 | Map | |
| Hackness Rock Pit | | Y | 0.1 | 0.3 | SE965907 | 1992 | Map | |
| Hambleton Quarry | | Y | 12.3 | 30.3 | SE058533 | 1991 | Map | |
| Harker's House Meadows | Y | | 14.2 | 35.1 | NY860019 | 1985 | Map | |
| Harwood Dale Moor | | Y | 0.4 | 1.1 | SE961991 | 1999 | Map | |
| Haugh and Gundale Slacks | Y | | 58.7 | 145.0 | SE797886, SE800880, SE807882, SE804871 & SE802863 | 1985 | Map | |
| Haw Crag Quarry | | Y | 9.0 | 23.3 | SD913564 | 1958 | Map | |
| Hawkswick Wood | Y | | 12.0 | 29.0 | SD946714 | 1975 | Map | |
| Hay-a-Park Gravel Pit | Y | | 44.9 | 111.0 | SE362581 | 1995 | Map | |
| Hayburn Wyke | Y | Y | 21.0 | 51.9 | TA012968 | 1958 | Map | |
| Hesley Moss | Y | | 10.9 | 27.1 | SD783602 | 1993 | Map | |
| Heslington Tillmire | Y | | 46.7 | 115.3 | SE638475 | 1990 | Map | |
| Hill House Nab | | Y | 4.0 | 9.9 | SE659993 | 1984 | Map | |
| Hole of Horcum | Y | Y | 145.2 | 358.8 | SE845935 | 1954 | Map | |
| Holy Well, Bridge | | Y | 1.7 | 4.2 | SE028533 | 1986 | Map | |
| Horse Field, Gilling | Y | | 2.1 | 5.2 | SE626758 | 1985 | Map | |
| Ingleborough | Y | Y | 5,230.0 | 12,923.4 | SD760740 | 1955 | Map | |
| Iron Scar and Hundale Point to Scalby Ness | Y | Y | 125.3 | 309.6 | TA017964, TA021957 – TA036908 | 1984 | Map | |
| Jeffry Bog | Y | | 7.6 | 18.8 | SE760667 & SE761664 | 1983 | Map | |
| Keasden Moor | | Y | 10.2 | 25.2 | SD725664 | 1989 | Map | |
| Kettlewell Meadows | Y | | 12.3 | 30.3 | SD960734 | 1986 | Map | |
| Kildale Hall | | Y | 6.6 | 16.2 | NZ609096 | 1993 | Map | |
| Kilnsey Flush | Y | | 1.5 | 3.7 | SD972675 | 1986 | Map | |
| Kirk Deighton | Y | | 4.0 | 9.9 | SE398501 | 2000 | Map | |
| Kirkby Wharfe | Y | | 21.7 | 53.7 | SE510400 | 1984 | Map | |
| Kirkdale Cave | | Y | 0.3 | 0.7 | SE678856 | 1960 | Map | |
| Kirkham Park & Riverside | Y | | 41.1 | 101.5 | SE737667 | 1954 | Map | |
| Kisdon Force Woods | Y | | 38.0 | 94.0 | NY900009 | 1974 | Map | |
| Ladyhills | Y | | 3.5 | 8.8 | SE912723 | 1993 | Map | |
| Langcliffe Scars and Jubilee, Albert and Victoria Caves | | Y | 684.9 | 1692.4 | SD845642 | 1955 | Map | |
| Len Pastures, Crackpot | Y | | 4.0 | 9.9 | SD975968 | 1989 | Map | |
| Leyburn Glebe | Y | | 2.6 | 6.5 | SE101896 | 1983 | Map | |
| Ling Gill | Y | | 5.1 | 12.6 | SD801785 | 1985 | Map | |
| Littlebeck Wood | Y | | 17.3 | 42.8 | NZ881045 | 1983 | Map | |
| Lord's Wood and Pasture | Y | | 6.4 | 15.8 | SD813647 | 1990 | Map | |
| Lovely Seat - Stainton Moor | Y | | 10,128.7 | 25,017.8 | SD863933 – SE114946 | 1995 | Map | |
| Low Gill Moor Wetlands | Y | | 62.9 | 155.4 | SD962874 | 1990 | Map | |
| Low Pasture | Y | | 10.5 | 25.9 | SE539893 | 1987 | Map | |
| Lower Swaledale Woods and Grasslands | Y | | 223.7 | 552.7 | NZ120014 | 1992 | Map | |
| Malham-Arncliffe | Y | Y | 4,933.9 | 12,191.7 | SD920676 | 1955 | Map | |
| Malham-Arncliffe (Cool Pasture) | Y | | 6.2 | 15.2 | SD967677 | 1995 | Map | |
| Mallerstang-Swaledale Head | Y | | 6,232.3 | 15,400.0 | NY840000 | 1964 | Map | |
| Mar Field Fen | Y | | 8.9 | 22.0 | SE223819 | 1988 | Map | |
| Marsett Rigg | Y | | 8.0 | 19.8 | SD900860 | 1985 | Map | |
| Meadow Croft, Skythorns | Y | | 0.4 | 0.9 | SD979639 | 1985 | Map | |
| Meal Bank Quarry | | Y | 7.2 | 17.7 | SD698735 | 1958 | Map | |
| Mill Holme Meadow, Thwaite | Y | | 0.6 | 1.5 | SD897980 | 1986 | Map | |
| Mount Pleasant Quarry | | Y | 1.0 | 2.5 | SE734670 | 1954 | Map | |
| Muker Meadows | Y | | 15.6 | 38.5 | SD914978 | 1988 | Map | |
| Nabgate | Y | | 6.7 | 16.5 | SE866847 | 1987 | Map | |
| Naburn Marsh | Y | | 13.3 | 32.9 | SE600479 | 1992 | Map | |
| New Close, Calvert Houses | Y | | 6.6 | 19.3 | SD920987 | 1986 | Map | |
| New House Meadows, Malham | Y | | 8.8 | 21.7 | SD933643 | 1990 | Map | |
| Newbridge Quarry | | Y | 7.1 | 17.5 | SE797861 | 1984 | Map | |
| Newby Moor | Y | | 276.8 | 684.0 | SD717692 | 1990 | Map | |
| Newsome Bridge Quarry | | Y | 1.6 | 4.0 | SE379511 | 1970 | Map | |
| Newton-le-willows Meadows | Y | | 4.2 | 10.5 | SE212893 & SE215892 | 1994 | Map | |
| Newtondale | Y | Y | 935.5 | 2,311.1 | SE820915 | 1955 | Map | |
| Nine Spring Dale | Y | | 4.5 | 11.2 | SE868693 | 1959 | Map | |
| Noddle End | Y | | 9.5 | 23.5 | SE528888 | 1987 | Map | |
| North Bay to South Toll House Cliff | | Y | 10.4 | 25.1 | TA048893, TA051894, TA046892 & TA048892 | 1954 | Map | |
| North York Moors | Y | Y | 44,087.7 | 108,940.6 | SE4996 – SE7192 & NZ9500 – NZ6910 | 1998 | Map | |
| Nunnington Cutting and Quarries | | Y | 5.6 | 13.8 | SE646785 & SE648787 | 1984 | Map | |
| Oughtershaw and Beckermonds | Y | | 75.9 | 187.6 | SD870810 | 1985 | Map | |
| Ox Close | Y | | 140.1 | 346.2 | SD982908 – SD992899 | 1985 | Map | |
| Oxenber and Wharfe Woods | Y | | 88.4 | 218.3 | SD785685 | 1955 | Map | |
| Pan Beck Fen | Y | | 2.5 | 6.1 | SD848559 | 1985 | Map | |
| Park Hall Meadows, Healaugh, Richmondshire | Y | | 6.8 | 16.8 | SE017989 | 1985 | Map | |
| Pen Y Ghent Gill | Y | Y | 215.6 | 532.7 | SD870740 | 1986 | Map | |
| Pen-y-ghent | Y | Y | 1,456.9 | 3,600.0 | SD850740 | 1955 | Map | |
| Pikedaw Calamine Caverns | Y | Y | 27.1 | 66.9 | SD875640 | 1958 | Map | |
| Pilmoor | Y | | 45.0 | 111.2 | SE460730 | 1992 | Map | |
| Pry and Bottom Meadows, Mid-mossdale | Y | | 3.6 | 8.8 | SD833917 – SD837919 | 1984 | Map | |
| Quarry Moor | Y | | 7.5 | 18.8 | SE309693 | 1986 | Map | |
| Raincliffe & Forge Valley Woods | Y | | 95.6 | 236.2 | SE986870 | 1956 | Map | |
| Richmond Meadows | Y | | 2.9 | 7.1 | NZ169000 & NZ176007 | 1995 | Map | |
| Rievaulx Woods | Y | | 17.0 | 42.0 | SE578847 | 1954 | Map | |
| Ripon Parks | Y | | 130.0 | 321.0 | SE310750 | 1983 | Map | |
| River Derwent | Y | | - | - | SE678287 – SE825757 | 1986 | Map | |
| River Ribble (Long Preston Deeps) | Y | | 168.8 | 417.2 | SD809621 – SD827570 | 1987 | Map | |
| River Ure Bank, Ripon Parks | | Y | 1.9 | 4.6 | SE310750 – SE307757 | 1988 | Map | |
| River Ure Grasslands | Y | | 18.5 | 45.8 | SE147870 – SE157862, SE017889 & SD985856 | 1986 | Map | |
| River Wharfe | Y | | 48.3 | 119.4 | SD940773 – SD973711 | 1985 | Map | |
| Robin Hood's Bay: Maw Wyke to Beast Cliff | Y | Y | 365.2 | 902.4 | NZ941082 – TA005987 | 1954–-74 | Map | |
| Runswick Bay | | Y | 9.9 | 24.4 | NZ809169 | 1984 | Map | |
| Ruston Cottage Pasture | Y | | 17.1 | 42.3 | SE956835 | 1984 | Map | |
| Ryedale Windypits | | Y | 11.2 | 27.7 | SE576836, SE582829 & SE588828 | 1960 | Map | |
| Salt Lake Quarry | Y | | 3.6 | 8.9 | SD773785 | 1975 | Map | |
| Scar Closes, Kisdon Side | Y | | 3.7 | 9.1 | NY893000 | 1988 | Map | |
| Scar End Wood | Y | | 27.4 | 67.7 | SE785990 | 1983 | Map | |
| School Share Section | | Y | 2.4 | 6.0 | SD845623 | 1952 | Map | |
| Scoska Wood | Y | | 68.9 | 170.3 | SD915725 | 1975 | Map | |
| Seato Pastures | Y | Y | 9.9 | 24.5 | SD729761 | 1990 | Map | |
| Seive Dale Fen | Y | | 10.4 | 26.7 | SE855877 | 1983 | Map | |
| Semerwater | Y | | 101.4 | 250.6 | SD913865 | 1975 | Map | |
| Shaw Beck Gill | | Y | 29.1 | 77.9 | NZ000037 – NZ011059 | 1977 | Map | |
| Shaw's Gate Quarry | | Y | 1.6 | 3.9 | SE524823 | 1984 | Map | |
| Sherburn Willows | Y | | 5.3 | 13.1 | SE487325 | 1985 | Map | |
| Sked Dale | Y | | 3.6 | 8.9 | SE969751 | 1954 | Map | |
| Skipwith Common | Y | | 293.0 | 724.0 | SE655373 | 1958 | Map | |
| Sleightholme Dale | Y | | 28.7 | 71.0 | SE666885 | 1986 | Map | |
| Snape Hill Quarry | | Y | 0.6 | 1.5 | SE509787 | 1984 | Map | |
| Snaper Farm Meadows | Y | | 15.9 | 39.3 | SE597912 | 1990 | Map | |
| South Pennine Moors | Y | Y | 20,938 | 51,738.7 | SD920300 | 1994 | Map | |
| Spell Howe Plantation | Y | | 4.3 | 10.6 | TA064790 | 1986 | Map | |
| Spiker's Hill Quarry | | Y | 6.4 | 15.8 | SE980862 | 1991 | Map | |
| Spring Wood, Hawnby | Y | | 42.4 | 104.7 | SE524896 | 1984 | Map | |
| Staithes - Port Mulgrave | | Y | 62.3 | 154.1 | NZ784189 – NZ797175 | 1984 | Map | |
| Stephen Ings, Crackpot | Y | | 3,089 | 7,630 | SD976965 | 1986 | Map | |
| Stonehead Beck (Gill Beck) | | Y | 0.6 | 1.4 | SD947432 | 1986 | Map | |
| Stonepit and Nova Slacks | Y | | 12.2 | 30.1 | SE883652 | 1986 | Map | |
| Stran's Gill | | Y | 7.8 | 19.3 | SD916786 | 1990 | Map | |
| Strensall Common | Y | | 578.7 | 1,430.1 | SE650600 | 1965 | Map | |
| Strid Wood | Y | | 58.9 | 145.6 | SE070560 | 1985 | Map | |
| Stump Cross Caves | | Y | 55.8 | 137.9 | SE092635 | 1989 | Map | |
| Stutton Ings | Y | | 5.1 | 12.7 | SE485405 | 1986 | Map | |
| Swale Lakes | Y | | 42.5 | 105.0 | SE248985 | 1986 | Map | |
| Swarth Moor | Y | | 34.1 | 85.2 | SD806695 | 1958 | Map | |
| Swinden Quarry | Y | Y | 112.1 | 276.9 | SD980616 | 1998 | Map | |
| Swineley Meadow, Widdale | Y | | 8.8 | 21.7 | SD802859 | 1984 | Map | |
| Tadcaster Mere | | Y | 8.7 | 21.5 | SE500430 | 1987 | Map | |
| The Ings, Amotherby | Y | | 18.0 | 44.6 | SE759752 | 1994 | Map | |
| Thixen Dale and Longdale | Y | | 89.7 | 221.5 | SE831600, SE843606 & SE845593 | 1954 | Map | |
| Thornton and Twisleton Glens | Y | | 59.6 | 147.2 | SD695745 & SD705745 | 1958 | Map | |
| Thowker Corner | Y | | 1.4 | 3.5 | SE081904 | 1990 | Map | |
| Three Dykes | Y | | 0.6 | 1.4 | SE804683 | 1962 | Map | |
| Thwaite Stones | Y | | 17.6 | 43.5 | SD895989 | 1984 | Map | |
| Tranmire | Y | | 11.0 | 27.2 | NZ770120 | 1985 | Map | |
| Tripsdale | Y | | 1,013 | 2,503 | SE585995 | 1965 | Map | |
| Troutsdale and Rosekirk Dale Fens | Y | | 13.1 | 32.3 | SE900876 & SE903879 | 1984 | Map | |
| Upper Dunsforth Carrs | Y | | 10.2 | 25.1 | SE442628 | 1984 | Map | |
| Upper Nidderdale | | Y | 137.2 | 347.2 | SE102755 | 1961 | Map | |
| Upper Wharfedale | Y | Y | 1,123.0 | 2,773.9 | SD965735 | 1994 | Map | |
| Vessey Pasture Dale and Back Dale | Y | | 26.8 | 66.2 | SE832622 | 1985 | Map | |
| Walden Meadows | Y | | 12.0 | 29.7 | SE005823 | 1986 | Map | |
| Wanlass Grasslands | Y | | 67.1 | 165.8 | SE065893 & SE054898 | 1986 | Map | |
| Waterdale | Y | | 36.3 | 90.0 | SE820617 | 1954 | Map | |
| Wath Quarry | | Y | 0.1 | 0.3 | SE673750 | 1991 | Map | |
| West End Meadow, Lunds | Y | | 3.7 | 9.1 | SD792295 | 1986 | Map | |
| West Nidderdale, Barden and Blubberhouses Moors | Y | | 13,418.9 | 33,144.8 | SE080705 – SD985580 – SE170510 | 1998 | Map | |
| Wharram Quarry | Y | | 6.4 | 16.0 | SE860653 | 1984 | Map | |
| Whernside | Y | Y | 3,839.4 | 9,487.1 | SD735802 | 1958 | Map | |
| Whitby-Saltwick | | Y | 42.4 | 104.7 | NZ901115 – NZ916109 | 1985 | Map | |
| Whitcliffe Section, Quarry Moor | | Y | 0.1 | 0.2 | SE307692 | 1998 | Map | |
| Whitfield Gill and Mill Gill | | Y | 18.7 | 46.2 | SD920932 – SD908945 | 1998 | Map | |
| Wintringham Marsh | Y | | 5.7 | 14.0 | SD875734 | 1975 | Map | |
| Yockenthwaite Meadows | Y | | 11.2 | 27.7 | SD912786 | 1986 | Map | |