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
Eastern Washington▲ 5 past weekNegligible7medium confidence · 41 bug mentions across 41 reports · latest 2026-11-07 · ▲ 5 past 3 days4 areas ▸
Eastern Washington▲ 5 past weekNegligible7
medium confidence · 41 bug mentions across 41 reports · latest 2026-11-07 · ▲ 5 past 3 days
Spokane Area/Coeur d'AleneNegligible13
low confidence · 8 bug mentions across 8 reports · latest 2026-11-07
Selkirk RangeNegligible7
estimated from Eastern Washington · too few recent reports here
Palouse and Blue MountainsNegligible7
estimated from Eastern Washington · too few recent reports here
Okanogan Highlands/Kettle River Range→ steady past weekNegligible0
low confidence · 15 bug mentions across 15 reports · latest 2026-10-22
Central Washington→ steady past weekNegligible5high confidence · 56 bug mentions across 56 reports · latest 2026-11-075 areas ▸
Central Washington→ steady past weekNegligible5
high confidence · 56 bug mentions across 56 reports · latest 2026-11-07
Tri-CitiesNegligible5
estimated from Central Washington · too few recent reports here
Potholes RegionNegligible5
estimated from Central Washington · too few recent reports here
Grand CouleeNegligible5
estimated from Central Washington · too few recent reports here
Wenatchee→ steady past weekNegligible4
medium confidence · 21 bug mentions across 21 reports · latest 2026-11-07
Yakima→ steady past weekNegligible0
medium confidence · 24 bug mentions across 24 reports · latest 2026-10-31
Issaquah Alps→ steady past weekNegligible3high confidence · 122 bug mentions across 122 reports · latest 2026-11-074 areas ▸
Issaquah Alps→ steady past weekNegligible3
high confidence · 122 bug mentions across 122 reports · latest 2026-11-07
Tiger Mountain▲ 5 past weekNegligible6
high confidence · 57 bug mentions across 57 reports · latest 2026-11-06
Taylor MountainNegligible3
estimated from Issaquah Alps · too few recent reports here
Squak Mountain→ steady past weekNegligible1
low confidence · 24 bug mentions across 24 reports · latest 2026-10-31
Cougar Mountain→ steady past weekNegligible1
medium confidence · 36 bug mentions across 36 reports · latest 2026-11-07
Puget Sound and Islands→ steady past weekNegligible3high confidence · 337 bug mentions across 337 reports · latest 2026-11-084 areas ▸
Puget Sound and Islands→ steady past weekNegligible3
high confidence · 337 bug mentions across 337 reports · latest 2026-11-08
Seattle-Tacoma Area→ steady past weekNegligible4
high confidence · 204 bug mentions across 204 reports · latest 2026-11-08
San Juan IslandsNegligible3
estimated from Puget Sound and Islands · too few recent reports here
Bellingham Area→ steady past weekNegligible3
medium confidence · 87 bug mentions across 87 reports · latest 2026-11-07
Whidbey Island→ steady past weekNegligible0
medium confidence · 25 bug mentions across 25 reports · latest 2026-11-07
Olympic Peninsula→ steady past weekNegligible2high confidence · 440 bug mentions across 440 reports · latest 2026-11-085 areas ▸
Olympic Peninsula→ steady past weekNegligible2
high confidence · 440 bug mentions across 440 reports · latest 2026-11-08
Olympia▲ 10 past weekNegligible11
low confidence · 28 bug mentions across 28 reports · latest 2026-11-07
Pacific Coast→ steady past weekNegligible2
low confidence · 57 bug mentions across 57 reports · latest 2026-11-01
Kitsap PeninsulaNegligible2
estimated from Olympic Peninsula · too few recent reports here
Hood Canal→ steady past weekNegligible1
high confidence · 228 bug mentions across 228 reports · latest 2026-11-08
Northern Coast→ steady past weekNegligible1
medium confidence · 117 bug mentions across 117 reports · latest 2026-11-05
North Cascades→ steady past weekNegligible1high confidence · 1038 bug mentions across 1038 reports · latest 2026-11-075 areas ▸
North Cascades→ steady past weekNegligible1
high confidence · 1038 bug mentions across 1038 reports · latest 2026-11-07
Mountain Loop Highway→ steady past weekNegligible2
high confidence · 313 bug mentions across 313 reports · latest 2026-11-07
Mount Baker Area→ steady past weekNegligible1
high confidence · 307 bug mentions across 307 reports · latest 2026-11-01
North Cascades Highway - Hwy 20→ steady past weekNegligible1
high confidence · 308 bug mentions across 308 reports · latest 2026-11-05
Pasayten→ steady past weekNegligible0
low confidence · 30 bug mentions across 30 reports · latest 2026-10-22
Methow/Sawtooth→ steady past weekNegligible0
medium confidence · 69 bug mentions across 69 reports · latest 2026-11-07
Mount Rainier Area→ steady past weekNegligible1high confidence · 414 bug mentions across 414 reports · latest 2026-11-075 areas ▸
Mount Rainier Area→ steady past weekNegligible1
high confidence · 414 bug mentions across 414 reports · latest 2026-11-07
Chinook Pass - Hwy 410→ steady past weekNegligible1
high confidence · 135 bug mentions across 135 reports · latest 2026-11-07
NW - Carbon River/MowichNegligible1
estimated from Mount Rainier Area · too few recent reports here
SW - Longmire/Paradise→ steady past weekNegligible1
medium confidence · 111 bug mentions across 111 reports · latest 2026-11-05
SE - Cayuse Pass/Stevens Canyon→ steady past weekNegligible1
medium confidence · 94 bug mentions across 94 reports · latest 2026-11-07
NE - Sunrise/White River→ steady past weekNegligible0
medium confidence · 59 bug mentions across 59 reports · latest 2026-11-07
Central Cascades→ steady past weekNegligible1high confidence · 531 bug mentions across 531 reports · latest 2026-11-085 areas ▸
Central Cascades→ steady past weekNegligible1
high confidence · 531 bug mentions across 531 reports · latest 2026-11-08
Leavenworth Area→ steady past weekNegligible1
medium confidence · 75 bug mentions across 75 reports · latest 2026-11-05
Stevens Pass - West→ steady past weekNegligible1
high confidence · 274 bug mentions across 274 reports · latest 2026-11-08
Entiat Mountains/Lake ChelanNegligible1
estimated from Central Cascades · too few recent reports here
Stevens Pass - East→ steady past weekNegligible1
high confidence · 104 bug mentions across 104 reports · latest 2026-11-01
Blewett Pass→ steady past weekNegligible0
high confidence · 46 bug mentions across 46 reports · latest 2026-11-04
Snoqualmie Region→ steady past weekNegligible1high confidence · 729 bug mentions across 729 reports · latest 2026-11-084 areas ▸
Snoqualmie Region→ steady past weekNegligible1
high confidence · 729 bug mentions across 729 reports · latest 2026-11-08
Snoqualmie Pass→ steady past weekNegligible1
high confidence · 317 bug mentions across 317 reports · latest 2026-11-08
North Bend Area→ steady past weekNegligible1
high confidence · 285 bug mentions across 285 reports · latest 2026-11-08
Salmon La Sac/Teanaway→ steady past weekNegligible0
high confidence · 119 bug mentions across 119 reports · latest 2026-11-07
Cle Elum AreaNegligible0
low confidence · 5 bug mentions across 5 reports · latest 2026-11-07
South Cascades→ steady past weekNegligible0high confidence · 178 bug mentions across 178 reports · latest 2026-11-075 areas ▸
South Cascades→ steady past weekNegligible0
high confidence · 178 bug mentions across 178 reports · latest 2026-11-07
Goat RocksNegligible0
estimated from South Cascades · too few recent reports here
White Pass/Cowlitz River ValleyNegligible0
estimated from South Cascades · too few recent reports here
Dark DivideNegligible0
estimated from South Cascades · too few recent reports here
Mount St. Helens→ steady past weekNegligible0
medium confidence · 68 bug mentions across 68 reports · latest 2026-11-01
Mount Adams Area→ steady past weekNegligible0
low confidence · 31 bug mentions across 31 reports · latest 2026-11-07
Southwest Washington→ steady past weekNegligible0medium confidence · 65 bug mentions across 65 reports · latest 2026-11-075 areas ▸
Southwest Washington→ steady past weekNegligible0
medium confidence · 65 bug mentions across 65 reports · latest 2026-11-07
Lewis River RegionNegligible0
estimated from Southwest Washington · too few recent reports here
Long Beach AreaNegligible0
estimated from Southwest Washington · too few recent reports here
Columbia River Gorge - WA→ steady past weekNegligible0
medium confidence · 21 bug mentions across 21 reports · latest 2026-11-07
Vancouver AreaNegligible0
estimated from Southwest Washington · too few recent reports here
Columbia River Gorge - ORNegligible0
low confidence · 12 bug mentions across 12 reports · latest 2026-11-07
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 11/9/2026, 3:48:14 PM.