Late August is when the mushroom year gets interesting, and the trigger is rain. A good soak followed by a few warm days can flush boletes and others up through the spruce duff within the week. Nothing to chase today; when conditions line up, this card will change and tell you.
Fresh caps pushing through duff and moss in the days after rain
Any time; mornings after wet spells are best
Spruce and mixed woods with deep, shaded duff
SourcesGBIF occurrence records within 200 km of Calgary, license-filtered (CC0/CC BY) and effort-normalized, Aug 2026
Photo: Mykola Lylo · CC BY-SA 4.0 · via Wikimedia Commons