The Irreplaceable Natural Areas Portfolio (Maryland Department of Natural Resources, Wildlife and Heritage Service, March 2023), establishing management objectives for irreplaceable natural areas, including: a map depicting boundaries for each area; a description of the unique features and threats for each area; and compatible and incompatible activities for each area, is incorporated by reference. Allegany County. Bells Hill Shale Glade. Big Run — Green Ridge. Black Sulphur Run. Boyer Knob. Carroll Road Barrens. Dans Mountain. Deep Run. East Gilpin Shale Cliff. East Pratt Hollow Slope. Fifteenmile Creek and Tributaries. Fifteenmile Creek North Complex. Fifteenmile Creek South Complex. Fort Hill. Fossil Run. Georges Creek Tributaries. Green Ridge North. Hanging Prairie Shale Glade. High Germany Shale Barrens. Indian Lick Woods. Indigo Cedars. Jacobs Road Woods. Kasecamp Neck. Line Run Shale Barren. Little Pine Lick Hollow. Lower Town Creek Shale Glade. Maniford Shale Slopes. Maple Run. Martin Mountain South. Mertens Avenue Woods. Mountain Road South Woods. Mountain Road Woods. North Bells Hill Cliff. North Branch Potomac — Dans Mountain Tributaries. Oldtown Road Shale Glade. Outdoor Club Barrens. Paw Bends. Peters Run Woods. Possum Hollow. Rocky Gap. Rocky Gap Glade. Rocky Gap Run. Sideling Hill Creek. Stafford Slope Woods. Straus Barren and Floodplain. Sugar Hollow Shale Glades. Sulphur Run. Terrapin Run South. The Narrows. Town Creek — Pumpkin Center. Town Creek — Turkey Camp. Town Creek and Tributaries. Town Hill East Woods. Town Hill South. Town Hill West Woods. Turkey Camp Shale Complex. Warrior Mountain Hillside. Warrior Mountain Sandstone Glade. West Boyer Knob. Whittaker Ridge South. Williams Road Shale Glade. Wills Mountain Outcrop. Yonkers Bottom Shale Barren. Anne Arundel County. Benfield Bottomland. Deep Run — Elkridge. Gumbottom Wetland. Little Patuxent Oxbow. Patapsco River and Tributaries. Patuxent River — Bowie. Severn Run East. Upper Patuxent Marshes. Baltimore County. Alberton Slopes. Beetree Run. Black Marsh. Days Cove. Forks-of-the-Patapsco. Gunpowder Falls — Central. Gunpowder Falls — Hereford. Ilchester Powerline and Woods. Little Falls. Little Gunpowder Falls. Patapsco River and Tributaries. Prettyboy Cove Springs. Soldiers Delight. Calvert County. Calvert Cliffs. Middle Patuxent Marshes. Parkers Creek. Patuxent — Yellow Bank Marsh. Patuxent Highlands. Caroline County. Bridgetown Ponds. Hollingsworth Ponds. Marshyhope Creek and Tributaries. Marshyhope Creek North. Tuckahoe Creek. Carroll County. Forks-of-the-Patapsco. Morgan Run and Tributaries. Morgan Run East. South Branch Patapsco River. Cecil County. Big Elk Creek. Big Elk Creek Springs. Gramies Run. Grove Neck. Horseshoe Point Wetlands. North Grove Point. Plum Creek. Susquehanna Islands. Charles County. Allen's Fresh. Chapman's Forest. Chicamuxen Creek. Mallows Bay. Mallows Bay Tributaries. Marbury Creek. Mattawoman Creek. Nanjemoy Creek. Persimmon Point Creek. Piney Branch Bog. Popes Creek. Purse Uplands and Ravines. Reeder Run. Smallwood Creek. Thorne Gut. Wards Run. Zekiah Swamp. Dorchester County. Barnes Landing Marsh. Becker Island Marsh. Bestpitch Marsh. Brookview Ponds. Cedar Creek Marsh. Centennial Ponds. Chicone Woods. Doctors Creek Marsh. Fishing Bay Wetlands. Guinea Island. Little Creek Marsh. Maple Dam Marsh. Marshyhope Sand Ridge Complex. McCreadys Creek Marsh. Steels Neck Woods. Thorofare Creek Marsh. Town Point Neck Woods. Upper Nanticoke River. Frederick County. Bells Chapel Woods. Big Hunting Creek. Boundary Rocks. Buzzard Branch. Cat Rock. Chick Road Springs. Cunningham Falls Hollow. High Run. Little Hunting Creek. Lower Monocacy River. Potomac Islands. Ridenour Swamp. Weverton Cliffs. Garrett County. Amish Road Wetlands. Ashton's Woods. Backbone Mountain Northeast. Bear Creek. Bear Creek Springs. Bear Pen Headwaters. Big Laurel Run Swamp. Big Run — Savage. Big Savage — Mt. Zion. Bucks Run. Callahan Swamp. Casselman River — Grantsville. Casselman River and Tributaries. Chisolm Run Swamp. Coleman Hollow — South Savage. Crabtree Cave. Crabtree Creek Cliffs. Crabtree Slopes. Crooked — Laurel Runs. Cucumber Hollow. Cunningham Swamp. Discovery Woods. Eagle Rock Sandstone Glades. East Piney Mountain. Folly Run. Foxtown Bog Complex. Georges Creek Tributaries. Herrington Lake Wetlands. Herrington Run. High Rock. Huckleberry Rocks Wetlands and Glades. Hutton Switch Bog. Little Bear Creek. Little Laurel Run. Lostland Run. Lower Deep Creek Complex. Maple Lick Run. Mechem Bog. Mellott Springs. Middle Fork Headwaters. Mill Run Rocks. Monroe Run. Mount Nebo Wetlands. Muddy Creek — Piney Run. Mudlick Run. Murley Run. North Branch Potomac — Backbone Mountain Tributaries. North Chisolm Run. North Piney Mountain. North Prong. Pine Swamp East. Piney Run Bog. Poplar Lick Run. Poplar Lick Swamp. Pronghorn Swamp. Puzzley Run. Russell Road Meadow. Russell Road Pool. Savage Ravines. Savage River — Warnick Run. Savage River and Tributaries. Southeast Savage Reservoir Woods. Spring Lick Run. Toliver Run. Turkey Lodge Ridge Woods. Upper Cucumber Hollow. Upper White Rock Run. Upperman Road Bog. Walnut Bottom Vernal Pond. Warnick Point Southwest. Warnick Run Hilltop. West Piney Run. Wolf Swamp. Youghiogheny River. Youghiogheny River and Tributaries. Harford County. Days Cove. Deer Creek and Tributaries. Falling Branch Woods. Herring Run. Hopkins Branch. Little Gunpowder Falls. Lower Deer Creek. Rocks Woods. Susquehanna Islands. Upper Deer Creek. Upper Deer Creek Hemlock Forest. Howard County. Deep Run — Elkridge. Forks-of-the-Patapsco. Hawlings River. Patapsco River and Tributaries. Patuxent River. South Branch Patapsco River. Upper Patuxent Woods. Kent County. Big Stone Ponds. Cypress Branch. Cypress Branch Ponds. Golts Ponds. Massey Ponds Complex. Millington Central Wetlands. Sassafras Shores. Montgomery County. Hawlings River. Patuxent River. Potomac Islands. Sycamore Landing Wetlands. Upper Patuxent Woods. Prince George’s County. Belt Woods. Mataponi Creek. Middle Patuxent Marshes. Patuxent Maple Swamp. Patuxent River — Bowie. Upper Patuxent Marshes. Zekiah Swamp. Queen Anne’s County. Andover Flatwoods. Browns Branch. Schoolhouse Woods. Tall Oaks. Tuckahoe Creek. Wye Island Hemlocks. Somerset County. Cedar Island. Chance Marsh. Dames Quarter Marsh. Dividing Creek and Tributaries. Dublin Swamp. Fairmount Marsh. Hazard Island. Hickory Point Cypress Swamp. Janes Island. Manokin River Tributaries. Upper Fairmount Marsh. St. Mary’s County. Elms Seeps. McIntosh Run. Moll Dyers Run. Point Lookout Creek. St. Mary's Lake Woods. St. Mary's River Bottomland. Talbot County. Seth Forest. Washington County. Beaver Creek. Black Rock Creek. Boyd Mountain Pond. Ernstville Stream. Fort Frederick Floodplain. Greenbrier Ponds. Hanging Rock Ridges. Hickory Ridge Ponds. Jugtown Cave. Kuhns Ridge Shale Barrens. Licking Creek. Potomac River — Long Ridge. Prathers Neck. Rabble Run Wetlands. Roundtop Hill. Sideling Hill Creek. Warner Gap Wetlands. Weverton Cliffs. Wicomico County. Campbell Branch. Campbell Complex. Dividing Creek and Tributaries. Nutters Neck. Powell Road Wetlands. Sharptown Dunes. Stump Gut Complex. Sturges Creek. Taylors Trail Sand Ridges. Wango Pines. Widow Hawkins Meadow. Worcester County. Assateague Island. Bachelors Branch. Blades Ponds. Chandler Woods. Corbin Canyon. Corkers Creek. Cottingham Mill Run. Disharoon Glades. Dividing Creek and Tributaries. Dividing Creek Ponds. Forest Road Dunes. Foster Woods. Furnace Dunes. Furnace Road Meadows. George Island Landing Marsh. Great Cypress Swamp. Hickory Point Cypress Swamp. Little Mill Run. Mattaponi. Nassawango Central. Nassawango Creek and Tributaries. Pikes Creek. Porters Crossing. Pusey Branch. Reedy Island. St. Lukes Wet Woods. Scarboro Creek Marsh. Scarboro Creek Woods. Shad Landing Cypress Swamp. Sinepuxent Sandflats. Skimmer Island Sandflats. South Point Island. Sturges Creek. Natural Resources Article, §3-503, Annotated Code of Maryland Effective date: September 4, 2023 (50:17 Md. R. 769)