DRAFT 2 Ecoregions of Montana Second Edition

116° 115° 114° 113° 112° 111° 110° 109° 108° 107° 106° 105° 104°

49° 49° BRITISH COLUMBIA 42d 42k ALBERTA CANADA SASKATCHEWAN 15d 41b 42q 42n 15h a s 17r NITED STATES u F 41a 42l U n l Plentywood a a 42n 42r 42m c t Scobey o h 42r e o a 42r

K d R e i 42r 17r k v a 41c e r Fresno 15h L 42i 42b 42d K Reservoir o

o Cut Bank N t e O n 41b 41b a S R i Rive a T r g Medicine 15t e Lake H Libby Shelby C Chinook D re Milk R 15q Havre ive A 42q ek r 42i Ma K

r O 15l ias k R e i T ve e r A Lake r Malta 41a C Elwell y 15c d 15h n a 42j Kalispell S 42r

g Glasgow i i uri R ver B o Conrad Wolf Point iss 43c 17r M ° 48° 15h 48

41d 43n e

k 42r r 42r a 15l ive 43n

L R 15o ri d 41b 42o ou 43c a ss e Teton River i 42r

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t e 17r k a a l L Sidney F k Choteau ec 15k 15e 41b P 41c rt Fort Benton F o 15h Clar Polson 15o Thompson k F Mi or 43l ssour Falls k 15c 41d i River 42q r 43c e 15b iv R e 43l n Great Falls 42r to 17r s 15e i River w ur lo Fla o l thead Rive 41b s e r 41b is Jordan 43a Y 41b M M Superior 42q 43o 43n u s 15a s 15p e

l 15a s 43n Glendive I h D 15c e A 43s l 15h l ° H R 47° 47 O i 43c 17r v 17r e 17x r 17p Lewistown Missoula 17aj 43s 43n 43a 43u 17t 43u 17al 17q 17q 16b 17x 17h 17w 43c 17al Helena White 17ak C Sulphur la 43e 43b rk 17v r Springs 43m e 17s 17x F v o i r Canyon Miles 43c R k t 17aj Ferry City 16e o 17q Harlowton Baker o 17h r Lake 43p r Roundup e t t 17ak Deer i ne River B wsto Lodge Yello Townsend 43p Hamilton 17am Musselshell River Forsyth 43t 17f Anaconda Boulder 17y 43p 43p 17ai ° 46° 46 43p 16h 17h 17g 17h 43c Butte 43o 43d 17ag 43n

17h 43p r 17ag 17y e Big Colstrip v Ri 17y r Timber e 16a 16h 43s d 43d 17w 17l 43p ow 17y 17i Billings Hardin P 43d 17ah 43n 43p Livingston 43p Columbus 17ac 17ab Bozeman 43p 17ab 17g 17h 17g 17i 43v Broadus 17ag 17ab 17z SOUTH DAK 17y 17g 43s 43e 17h 17z 43n S er 17l almon Riv 17u 17l 17aa 17e

OTA 17ae 17h 43v 43k 17aa 43p Dillon 17h Salmon Red 43g 17ad 17m 45° 45° 17e 17ab Lodge 17m 43q 43g 17g 17i 17aa 18b 17ab 17e 17h 17h 17k WYOMING 17j 17e 17ab 17d Hebgen Sheridan 17e 17e Lake 17e 17l

17j 17af 17ab 17e 17h Yellowstone Cody Lake WYOMING IDAHO

115° 114° 113° 112° 111° 110° 109° 108° 107° 106° 105° Second Edition, 2002

15 Northern Rockies 17 Middle Rockies 17z Tobacco Root Mountains 42 Northwestern Glaciated Plains 43p Pine Scoria Hills 15a Grave Creek Range-Nine Mile Divide 17d Eastern Gravelly Mountains 17aa Dry Intermontane Sagebrush Valleys 42b Collapsed Glacial Outwash 43q Mesic Dissected Plains 15b Camas Valley 17e Barren Mountains 17ab Dry Gneissic-Schistose-Volcanic Hills 42d Northern Missouri Coteau 43s Non-calcareous Foothill Grassland 15c Flathead Valley 17f Crazy Mountains 17ac Big Hole 42i Glaciated Dark Brown Prairie 43t Shield-Smith Valleys 15d Tobacco Plains 17g Mid-Elevation Sedimentary Mountains 17ad Western Beaverhead Mountains 42j Glaciated Northern Grasslands 43u Limy Foothill Grassland 15e Flathead Hills and Mountains 17h Alpine Zone 17ae Forested Beaverhead Mountains 42k Coteau Lakes Upland 43v Pryor-Big Horn Foothills 15h High Northern Rockies 17i Absaroka-Gallatin Volcanic Mountains 17af Centennial Basin 42l Sweetgrass Uplands 15i Clearwater Mountains and Breaks 17j Yellowstone Plateau 17ag Pioneer-Anaconda Ranges 42m Cherry Patch Moraines 15k Clark Fork Valley and Mountains 17k Granitic Subalpine Zone 17ah Eastern Pioneer Sedimentary Mountains 42n Milk River Pothole Upland 15l Salish Mountains 17l Gneissic-Schistose Forested Mountains 17ai Elkhorn Mountains-Boulder Batholith 42o North Central Brown Glaciated Plains 17aj Eastern Divide Mountains 15o Coeur d' Alene Metasedimentary Zone 17m Dry Mid-Elevation Sedimentary Mountains 42q Rocky Mountain Front Foothill Potholes Level III ecoregion 15p St. Joe Schist-Gneiss Zone 17p Foothill Potholes 17ak Deer Lodge-Philipsburg-Avon Grassy 42r Foothill Grassland Level IV ecoregion 15q Purcell-Cabinet-North Bitterroot Mountains 17q Big Snowy-Little Belt Carbonate Mountains Intermontane Hills and Valleys 43 Northwestern Great Plains County boundary 15t Stillwater-Swan Wooded Valley 17r Scattered Eastern Igneous-Core Mountains 17al Southern Garnet Sedimentary-Volcanic Mountains 43a Missouri Plateau State boundary 17s Bitterroot-Frenchtown Valley 17am Flint Creek-Anaconda Mountains 43b Little Missouri Badlands International boundary 17t Limy Foothill Savanna 18 Wyoming Basin 43c River Breaks 17u Paradise Valley 18b Bighorn Basin 43d Forested Buttes 16 Idaho Batholith 17v Big Belt Forested Highlands 16a Eastern Batholith 41 Canadian Rockies 43e Sagebrush Steppe 17w Townsend Basin 43g Semiarid Pierre Shale Plains 16b Lochsa Uplands 41a Northern Front 15 10 5 0 30 60 mi 17x Rattlesnake-Blackfoot-South Swan-Northern 43k Dense Clay Prairie 16e Glaciated Bitterroot Mountains and Canyons Garnet-Sapphire Mountains 41b Crestal Alpine-Subalpine Zone 43l Missouri Breaks Woodland-Scrubland 30 20 100 60 120 km 16h High Idaho Batholith 17y Townsend-Horseshoe-London Sedimentary 41c Western Canadian Rockies 43m Judith Basin Grassland Albers equal area projection Hills 41d Southern Carbonate Front Standard parallels 46° N and 48° N 41e Flathead Thrust Faulted Carbonate-Rich 43n Montana Central Grasslands Mountains 43o Unglaciated Montana High Plains