Mosquito Misery Index
How bad are the bugs right now, by region — like AQI, but for mosquitoes. Scored 0–100 from recent WTA trip reports; fresh local reports count most and old ones decay away.
What the number means
Hikers grade bugs on WTA trip reports in four steps. MMI is the average grade of recent reports in a region, stretched to 0–100 — so the score always reads as “what the average fresh report says.” Newer reports count more: a report's influence halves every 10 days.
0 “No bugs”33 “Not too bad”67 “An annoyance”100 “Terrible”
Negligible 0–20Noticeable 20–40Annoying 40–60Miserable 60–80Unbearable 80–100
North Cascades→ steady past weekNoticeable31high confidence · 687 bug mentions across 1043 reports · latest 2026-08-065 areas ▸
North Cascades→ steady past weekNoticeable31
high confidence · 687 bug mentions across 1043 reports · latest 2026-08-06
Pasayten→ steady past weekAnnoying45
low confidence · 36 bug mentions across 49 reports · latest 2026-07-25
North Cascades Highway - Hwy 20→ steady past weekNoticeable35
high confidence · 174 bug mentions across 275 reports · latest 2026-08-04
Mountain Loop Highway→ steady past weekNoticeable29
high confidence · 274 bug mentions across 436 reports · latest 2026-08-04
Mount Baker Area→ steady past weekNoticeable29
high confidence · 162 bug mentions across 215 reports · latest 2026-08-04
Methow/Sawtooth▼ 6 past weekNoticeable23
medium confidence · 32 bug mentions across 55 reports · latest 2026-08-06
Central Cascades→ steady past weekNoticeable28high confidence · 447 bug mentions across 708 reports · latest 2026-08-065 areas ▸
Central Cascades→ steady past weekNoticeable28
high confidence · 447 bug mentions across 708 reports · latest 2026-08-06
Stevens Pass - East→ steady past weekNoticeable34
high confidence · 79 bug mentions across 106 reports · latest 2026-08-03
Stevens Pass - West→ steady past weekNoticeable31
high confidence · 201 bug mentions across 318 reports · latest 2026-08-04
Entiat Mountains/Lake Chelan→ steady past weekNoticeable25
low confidence · 25 bug mentions across 50 reports · latest 2026-07-28
Leavenworth Area→ steady past weekNoticeable24
high confidence · 97 bug mentions across 163 reports · latest 2026-08-06
Blewett Pass→ steady past weekNegligible2
low confidence · 17 bug mentions across 37 reports · latest 2026-07-31
Central Washington→ steady past weekNoticeable24low confidence · 24 bug mentions across 64 reports · latest 2026-07-275 areas ▸
Central Washington→ steady past weekNoticeable24
low confidence · 24 bug mentions across 64 reports · latest 2026-07-27
WenatcheeNoticeable24
estimated from Central Washington · too few recent reports here
Potholes RegionNoticeable24
estimated from Central Washington · too few recent reports here
Grand CouleeNoticeable24
estimated from Central Washington · too few recent reports here
Tri-CitiesNoticeable24
estimated from Central Washington · too few recent reports here
Yakima→ steady past weekNoticeable20
low confidence · 11 bug mentions across 33 reports · latest 2026-07-27
Olympic Peninsula→ steady past weekNoticeable23high confidence · 360 bug mentions across 606 reports · latest 2026-08-065 areas ▸
Olympic Peninsula→ steady past weekNoticeable23
high confidence · 360 bug mentions across 606 reports · latest 2026-08-06
Pacific Coast→ steady past weekNoticeable28
high confidence · 69 bug mentions across 119 reports · latest 2026-08-03
Hood Canal→ steady past weekNoticeable25
high confidence · 158 bug mentions across 268 reports · latest 2026-08-06
Olympia→ steady past weekNegligible19
medium confidence · 34 bug mentions across 47 reports · latest 2026-08-06
Northern Coast→ steady past weekNegligible19
high confidence · 76 bug mentions across 131 reports · latest 2026-08-05
Kitsap Peninsula→ steady past weekNegligible13
medium confidence · 19 bug mentions across 36 reports · latest 2026-08-04
South Cascades→ steady past weekNoticeable22high confidence · 185 bug mentions across 296 reports · latest 2026-08-055 areas ▸
South Cascades→ steady past weekNoticeable22
high confidence · 185 bug mentions across 296 reports · latest 2026-08-05
White Pass/Cowlitz River Valley▼ 4 past weekNoticeable32
medium confidence · 43 bug mentions across 59 reports · latest 2026-08-05
Goat Rocks→ steady past weekNoticeable22
medium confidence · 48 bug mentions across 60 reports · latest 2026-08-02
Dark DivideNoticeable22
estimated from South Cascades · too few recent reports here
Mount Adams Area→ steady past weekNegligible19
medium confidence · 28 bug mentions across 47 reports · latest 2026-08-02
Mount St. Helens→ steady past weekNegligible17
high confidence · 60 bug mentions across 115 reports · latest 2026-08-01
Snoqualmie Region→ steady past weekNoticeable21high confidence · 789 bug mentions across 1304 reports · latest 2026-08-064 areas ▸
Snoqualmie Region→ steady past weekNoticeable21
high confidence · 789 bug mentions across 1304 reports · latest 2026-08-06
Salmon La Sac/Teanaway→ steady past weekNoticeable26
high confidence · 148 bug mentions across 225 reports · latest 2026-08-06
North Bend Area→ steady past weekNoticeable21
high confidence · 228 bug mentions across 414 reports · latest 2026-08-03
Snoqualmie Pass→ steady past weekNegligible19
high confidence · 392 bug mentions across 630 reports · latest 2026-08-03
Cle Elum Area→ steady past weekNegligible0
low confidence · 14 bug mentions across 23 reports · latest 2026-08-01
Mount Rainier Area→ steady past weekNegligible18high confidence · 459 bug mentions across 695 reports · latest 2026-08-065 areas ▸
Mount Rainier Area→ steady past weekNegligible18
high confidence · 459 bug mentions across 695 reports · latest 2026-08-06
SW - Longmire/Paradise→ steady past weekNoticeable21
high confidence · 90 bug mentions across 158 reports · latest 2026-08-06
NE - Sunrise/White River→ steady past weekNegligible19
high confidence · 143 bug mentions across 196 reports · latest 2026-08-05
NW - Carbon River/MowichNegligible18
estimated from Mount Rainier Area · too few recent reports here
SE - Cayuse Pass/Stevens Canyon→ steady past weekNegligible18
high confidence · 80 bug mentions across 110 reports · latest 2026-08-06
Chinook Pass - Hwy 410→ steady past weekNegligible16
high confidence · 130 bug mentions across 208 reports · latest 2026-08-05
Eastern Washington→ steady past weekNegligible18medium confidence · 45 bug mentions across 92 reports · latest 2026-08-014 areas ▸
Eastern Washington→ steady past weekNegligible18
medium confidence · 45 bug mentions across 92 reports · latest 2026-08-01
Selkirk Range→ steady past weekNoticeable26
low confidence · 18 bug mentions across 26 reports · latest 2026-07-27
Okanogan Highlands/Kettle River RangeNegligible18
estimated from Eastern Washington · too few recent reports here
Palouse and Blue MountainsNegligible18
estimated from Eastern Washington · too few recent reports here
Spokane Area/Coeur d'Alene→ steady past weekNegligible11
low confidence · 17 bug mentions across 28 reports · latest 2026-08-01
Issaquah Alps→ steady past weekNegligible16high confidence · 82 bug mentions across 150 reports · latest 2026-08-064 areas ▸
Issaquah Alps→ steady past weekNegligible16
high confidence · 82 bug mentions across 150 reports · latest 2026-08-06
Tiger Mountain▼ 3 past weekNegligible20
medium confidence · 44 bug mentions across 80 reports · latest 2026-08-05
Squak MountainNegligible16
estimated from Issaquah Alps · too few recent reports here
Taylor MountainNegligible16
estimated from Issaquah Alps · too few recent reports here
Cougar Mountain→ steady past weekNegligible16
medium confidence · 22 bug mentions across 37 reports · latest 2026-08-06
Southwest Washington→ steady past weekNegligible12medium confidence · 71 bug mentions across 131 reports · latest 2026-08-035 areas ▸
Southwest Washington→ steady past weekNegligible12
medium confidence · 71 bug mentions across 131 reports · latest 2026-08-03
Columbia River Gorge - WA→ steady past weekNoticeable22
low confidence · 20 bug mentions across 46 reports · latest 2026-08-03
Lewis River Region→ steady past weekNegligible13
low confidence · 14 bug mentions across 26 reports · latest 2026-08-01
Columbia River Gorge - ORNegligible12
estimated from Southwest Washington · too few recent reports here
Long Beach AreaNegligible12
estimated from Southwest Washington · too few recent reports here
Vancouver AreaNegligible12
estimated from Southwest Washington · too few recent reports here
Puget Sound and Islands→ steady past weekNegligible10high confidence · 194 bug mentions across 374 reports · latest 2026-08-064 areas ▸
Puget Sound and Islands→ steady past weekNegligible10
high confidence · 194 bug mentions across 374 reports · latest 2026-08-06
Whidbey Island→ steady past weekNoticeable24
medium confidence · 17 bug mentions across 29 reports · latest 2026-08-05
Seattle-Tacoma Area→ steady past weekNegligible10
high confidence · 106 bug mentions across 205 reports · latest 2026-08-06
San Juan Islands→ steady past weekNegligible9
low confidence · 20 bug mentions across 29 reports · latest 2026-08-03
Bellingham Area→ steady past weekNegligible6
high confidence · 49 bug mentions across 107 reports · latest 2026-08-05
How this works
Every recent trip report contributes a bug-misery score — from the report's structured bug rating when the hiker filled it in, otherwise mined from the report text (mentions of bug spray, DEET, or head nets count as bugs-present evidence). Each report's influence halves every 10 days, so the index always reflects current conditions: a six-month-old horror story can't inflate today's number. Regions without enough recent reports show their parent region's estimate instead of a confident local reading. Trend arrows compare today's reading against what the index read 3 and 7 days ago; changes under 3 points show as steady.
Data from WTA trip reports. Updated hourly. Generated 8/11/2026, 8:10:46 AM.