La Grande Mushroom Calendar
La Grande sits in the Blue Mountains and a drier, rain-shadowed climate, with roughly 17.4 inches of annual rainfall. The ground warms and reaches early fruiting potential around April, by which point the average last frost (May 6) has usually passed. Summer fruitings stay confined to pockets of moisture — irrigated urban ground can be one — and the real abundance arrives with the fall rains in October. The first frosts around Oct 1 eventually close the main season, though hardy cool-season species hang on.
Best months
May, June, and October
Ground warms
~April
Frost-free
May 6 – Oct 1
Annual rain
17.4"
Driest
July through September
Species tracked
4
What Fruits When Near La Grande
JFMAMJJASONDMorelSpring KingKing BoleteBlewit
Shading shows when each species typically fruits within about 10 miles, not abundance. Based on iNaturalist observation trends.
The Shape of the Season
All species combined — local observations within about 10 miles, by month.
Weather Through the Year
Average daily high–low (°F)
Average monthly precipitation (inches)
The Forest Around La Grande
Dominant tree species within about 10 km — the hosts that shape which mushrooms grow here.
- Douglas-fir35%
- Ponderosa Pine31.2%
- Grand Fir26.3%
- Lodgepole Pine7.5%
Track the Season as It Happens
This calendar shows typical timing. A free Salish Mushrooms account adds live environmental layers — soil moisture, soil temperature, snow cover, and recent precipitation — on the Forayz map.
Species to Know Near La Grande
Common Questions
When is mushroom season in La Grande?
Near La Grande, the season skews toward spring. The strongest months in the local observation record are May, June, and October.
When do morels fruit near La Grande?
Morel reports near La Grande peak in May. Timing tracks soil temperature, so south-facing slopes and lower elevations start earlier and higher ground runs later.
What mushrooms grow near La Grande?
4 species show up in the observation record within about 10 miles of La Grande, including Morel, Spring King, King Bolete, Blewit. The calendar above shows when each one typically fruits.
Want live conditions instead of climatology? The Forayz map layers soil moisture, soil temperature, snow cover, and recent burns over the same area.
Nearby Calendars in Oregon
- Bend Mushroom Calendar
- Brookings Mushroom Calendar
- Cascade Locks Mushroom Calendar
- Corvallis Mushroom Calendar
- Detroit Mushroom Calendar
- Eugene Mushroom Calendar
- Klamath Falls Mushroom Calendar
- Lincoln City Mushroom Calendar
- Medford Mushroom Calendar
- Newport Mushroom Calendar
- Portland Mushroom Calendar
- Salem Mushroom Calendar