CANADA CANADA

Upper Columbia Evolutionary Unit

CoastalEvolutionary Unit

SnakeEvolutionary Unit

Upp er Deschutes RiverExtirpated

Okan ogan RiverExtirpated

Lake ChelanExtirpated

Clackamas RiverExtirpated

Nor th and Sou th Fork Santiam RiversExtirpated

McCloud RiverExtirpated

Satsop RiverExtirpated

Lower Nisq ually RiverExtirpated

Wh ite Salmon RiverExtirpated

(111

(64

(31

(40

(38

(72

(27

(50

(105

(75 (21

(98

(68

(76

(101

(74

(6(69

(88

(65

(22(28

(77

(12

(54

(61

(100

(85

(45

(108

(73

(49

(92

(55

(52

(18

(29

(91

(62

(83

(8

(106

(16

(59

(107

(87

(46

(82

(56

(70

(7

(95

(14

(13

(94

(102

(84

(113

(78

(86

(79(35

(97

(121

(67

(9

(10

(19

(119

(25

(71

(93

(44

(30

(114

(4

(112

(109

(5

(2

(11

(3

(24

(53

(103

(110

(33

(80

(115

(1

(20

(58

(118

(60

(117

(23

(89

(41

(63

(99(48

(26

(42

(51

(104

(34(43

(32 (96

(90

(116

(120

(36

(17

(37

(66

(39

(57

(15

(81

(47

LIL LOOET

ELK RIVER

KO OTENAY L AKE

SQUAM ISH

CO LUMBIA REACH

ST. MARY RIVER

DUNCAN LAKE

BUL L RIVER

UPPER ARRO W L AKE

LOWER ARROW LAKE

KO OTENAY RIVER

FRASER CANYON

REVEL STO KE LAKE

LOWER F RASER

CO LUMBIA RIVER

KICKING HORSE RIVER

SLO CAN RIVER

CANO E REACH

HARRISO N RIVER

SKAGIT RIVERCHILL IWACK RIVER

0 30 60 90 12015Miles

µLegendUS Core Area C-Rank

C1-High Risk (n=43)C2-At Risk (n=44)C3-Potential Risk (n=30)C4-Low Risk (n=4)CX - Likely ExtirpatedC?Evolutionary BoundaryBritish Columbia RankingRivers

Map OCore Area Interaction

with Canada

US Fish and Wildlife ServicePacific Region, Ecological ServicesApril 6, 2005

ID Core Area ID Core Area ID Core Area 1 Chester Morse Lake 41 Granite Creek 81 Opal Lake 2 Chilliwack River 42 Harrison Lake 82 Pahsimeroi River 3 Dungeness River 43 Holland Lake 83 Pend Oreille River 4 Elwha River 44 Hood River 84

Pine, Indian & Wildhorse Creeks

5 Hoh River 45 Hungry Horse Reservoir 85 Powder River 6 Lower Skagit River 46 Imnaha River 86 Priest Lakes 7 Nooksack River 47 Isabel Lakes 87 Rock Creek 8 Puyallup River 48 Kintla Lake 88 Selway River 9 Queets River 49 Klickitat River 89 Sheep Creek

10 Quinault River 50 Kootenai River 90 Sophie Lake 11 Skokomish River 51 Lake Creek 91 South Fork Clearwater River 12 Snohomish & Skykomish Rivers 52 Lake Koocanusa 92 South Fork Salmon River 13 Stillaguamish River 53 Lake McDonald 93 Squaw Creek 14 Upper Skagit River 54 Lake Pend Oreille 94 Swan Lake 15 Akokala Lake 55 Lemhi River 95 Touchet River 16 Anderson Ranch Reservoir 56 Lewis River 96 Trout Lake 17 Arrow Lake 57 Lincoln Lake 97 Tucannon River 18 Arrowrock Reservoir 58 Lindbergh Lake 98 Umatilla River 19 Asotin Creek 59 Little Lost River 99 Upper Kintla Lake 20 Big Salmon Lake 60 Little Minam River 100

Upper Mainstem John Day River

21 Bitterroot River 61 Little-Lower Salmon River 101 Upper Salmon River 22 Blackfoot River 62 Lochsa River 102

Upper South Fork Payette River

23 Bowman Lake 63 Logging Lake 103 Upper Stillwater Lake 24 Bull Lake 64 Lower Deschutes River 104 Upper Whitefish Lake 25 Cabinet Gorge Reservoir 65 Lower Flathead River 105 Upper Willamette River 26

Cerulean, Quartz & Middle Quartz Lakes 66 Lower Quartz Lake 106 Walla Walla River

27 Clark Fork River (Section 1) 67 Lucky Peak Reservoir 107 Weiser River 28 Clark Fork River (Section 2) 68 Malheur River 108 Wenatchee River 29 Clark Fork River (Section 3) 69 Methow River 109 West Fork Bitterroot River 30 Clearwater River & Lakes 70 Middle Fork John Day River 110 Whitefish Lake 31 Coeur d'Alene Lake 71 Middle Fork Payette River 111 Yakima River 32 Cyclone Lake 72 Middle Fork Salmon River 112 Sycan River 33 Deadwood River 73

Middle Salmon River-Chamberlain 113 Upper Klamath Lake

34 Doctor Lake 74 Middle Salmon River-Panther 114 Upper Sprague River 35 Entiat River 75 Middle-Lower Clearwater River 115 Belly River 36 Fish Lake (Lochsa River) 76 North Fork Clearwater River 116 Cracker Lake 37

Fish Lake (North Fork Clearwater River) 77 North Fork John Day River 117 Lee Creek

38 Flathead Lake 78 North Fork Payette River 118 Red Eagle Lake 39 Frozen Lake 79 Noxon Rapids Reservoir 119 Saint Mary River 40 Grande Ronde River 80 Odell Lake 120 Slide Lake

121 Jarbidge River

Core Area Key

Bull Trout Risk AssessmentConservation RiskPresumed Conservation RiskPresumed HealthyRisk UnknownRivers