Forager Forecast

How the forecast works

Each map square gets a habitat score, a usual calendar, and this season's shift; your pin adds its own weather.

1Where it grows

Habitat map for chanterelles across California, Oregon, and Washington
Chanterelles: 2,042 finds compared with other fungi logged by the same people; darker green is better habitat.

2When it fruits

Near San Francisco (38° N)

Chanterelles timing, Near San FranciscoNowDJFMAMJJASO

Central Oregon coast (45° N)

Chanterelles timing, Central Oregon coastNowDJFMAMJJASO

Puget Sound (48° N)

Chanterelles timing, Puget SoundNowDJFMAMJJASO

Chanterelles at about 1,000 ft, by latitude: the season starts in the north.

3This season

This season against the typical year in Del Norte CountyThis season against the typical year in Del Norte CountyNowDJFMAMJJASO

This seasonTypical year

Del Norte County, California, 1,000 to 2,000 ft: this fall's first inch of rain moved chanterelles about 3 weeks earlier.

4Your spot

Drop a pin and the map adds the last 30 days and next 14 of rain and soil from Open-Meteo, at the height you pick.

Open the map

How well it works

0%25%50%75%100%ChanterellesChanterelles: other fungi shaded 33%Chanterelles: held-back finds shaded 86%86%33%King boletesKing boletes: other fungi shaded 23%King boletes: held-back finds shaded 86%MorelsMorels: other fungi shaded 12%Morels: held-back finds shaded 82%Matsutakelocations blurred by iNaturalist, so not scoredBlack trumpetsBlack trumpets: other fungi shaded 10%Black trumpets: held-back finds shaded 80%Candy capsCandy caps: other fungi shaded 23%Candy caps: held-back finds shaded 89%

Held-back finds shadedOther fungi shaded

Finds the model never saw, in the week they were found, against other fungi logged the same way.

Show as a table
MushroomHeld-back finds shadedOther fungi shaded
Chanterelles86%33%
King boletes86%23%
Morels82%12%
Matsutaken/an/a
Black trumpets80%10%
Candy caps89%23%

Each mushroom

MushroomFindsSeason moves withTopsoil moistureSoil temp
Chanterelles2,042first inch of fall rain17 to 33%44 to 60 °F
King boletes1,301usual calendar only11 to 31%46 to 60 °F
Morels1,350first 46 °F soil day after Feb 115 to 29%48 to 62 °F
Matsutake929usual calendar only19 to 33%41 to 55 °F
Black trumpets354first inch of fall rain26 to 33%44 to 54 °F
Candy caps1,600first inch of fall rain25 to 34%44 to 55 °F

Soil readings are the middle 70% on find days since 2022.

The percent

A fixed scale tied to the map's colors (12% lightest, 70% darkest, 92% top), not the odds of finding one on a walk.

Limits

  • It can't see private land, access rules, or how hard a spot has been picked.
  • Fog drip and microclimates smaller than a weather grid are invisible to it.
  • Matsutake locations are blurred by iNaturalist, so that map is coarser.

Updates

  • Weather and pages rebuild every morning around 5 am Pacific.
  • The habitat and timing model was last trained on 2026-10-24.

Data

iNaturalist observations, gridMET daily rain and temperature, PRISM climate normals, NLCD 2021 land cover, SoilGrids pH, fire perimeters from CAL FIRE and NIFC, Mapzen Terrarium elevation, Open-Meteo weather, and OpenStreetMap and Protomaps basemaps.