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4,500–8,678 ft · MT🚗 Directions
Lewis & Clark National Forest — the Little Belt, Big Belt, and Highwood Mountains across north-central Montana. Mixed lodgepole pine, Engelmann spruce, subalpine fir, Douglas fir, and aspen. Showdown Ski Area, Kings Hill, and the Smith River corridor for access. King boletes and lobsters after July-August thunderstorms; morels follow spring burns in lodgepole.
Updated Jul 13, 4:19 AM MT
**Lewis & Clark NF / Little Belts – Tier A Assessment** You're sitting in prime oyster season right now—soil temps are locked at 66°F with consistent moisture averaging 0.20 VWC over the week, which is exactly where oysters flush hard. The 2.63" over two weeks has kept the profile wet enough to overcome the high desiccation risk at this elevation, and complete snowmelt means substrate access across your productive bands. This is a genuine A-tier window, not a narrow one. Oysters are your only play here, and they're the right play: the sustained moisture and soil temp alignment is textbook. Watch the next 7 days closely—you've got 0.11" in the last week, which is thin, and high elevation exposure means you could dry out fast if a ridge parks overhead. That desiccation flag is real, not theoretical. **Hot tip:** Hit north-aspect shaded draws in the 6,000–7,000 ft band where seepage holds longest; oysters there will fruit 3–5 days ahead of ridgeline colonies.
Generated by Claude (Anthropic) from the structured weather, soil, and phenology data on this page. The LLM can misread edge cases — treat this as a starting hypothesis, not a guarantee. Always verify conditions on the ground before committing to a long drive.
Precip 7d
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Helena-Lewis and Clark National Forest
Helena-Lewis and Clark National Forest
Helena-Lewis and Clark National Forest
⚠ Road Access Notice
Always verify road access is public before following GPS directions to mountain areas. Many forest roads are seasonal, gated, or require 4WD. Dispersed camping follows USFS/BLM rules (typically 14-day limit). Check ranger district offices for current road and campground conditions.
0.11"
PRISM 4km · thru 07-11
Precip 14d
Observed precipitation from PRISM 4km gridded analysis, sampled at the region centroid through 2026-07-11. Used when no SNOTEL/SCAN station is mapped to this region.2.63"
PRISM 4km · thru 07-11
Soil Temp
66°F
SWE
Snow Water Equivalent — how much water is in the snowpack vs. normal. Declining SWE means snowmelt is adding moisture to the soil.0%
Drought
None
Snowmelt
complete
All conditions met (soil 66°F, sustained 7/7 days above threshold, today 0.17 VWC, 7d avg 0.20)
Primordia readiness: Cold = mycelium dormant. Activating = soil warming, primordia building. Primed = 5+ sustained warm days at species threshold; fruiting imminent if moisture cooperates. Based on Schmidt 1983 / Mihail 2007.