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620–720 ft · OH🚗 Directions
Oak Openings Region west of Toledo — a globally rare oak savanna and sand prairie mosaic on former Lake Warren dune deposits. White oak, black oak, bur oak, pin oak, and scattered jack pine across open savanna. Designated a "Last Great Place" by The Nature Conservancy. Morels in the wet-woods bottoms; chanterelles and chicken-of-the-woods in oak woodlands; unique boletes in jack pine stands.
Updated May 29, 4:19 AM MT
**Oak Openings Tier A: Peak epigeous window, substrate-dependent** You're in a sweet spot—soil temp just crested 64°F with seven days of sustained warmth and solid moisture averaging 0.23 VWC. The 0.5" rain in the last week held, and the 14-day cumulative (1.17") broke any true drought stress. This is why you're A-tier: the region hits the moisture trigger and the geophyte/lignicolous threshold simultaneously. The viable roster is massive because Oak Openings' sandy loam and abundant oak/aspen/deadwood mean you can work multiple guilds at once—hit decomposer polypores (Artist's Conk, Red-Belted), wood-loving cups (Green Elfcup, Black Cup), and the half-free morel push that's just coming online. Wine caps and oysters will fruit hard if you find retained duff or enriched patches. The real constraint is *desiccation risk*: this sandy substrate drains fast and wind exposure is brutal. You've got 3–5 days before moisture dips below sustained threshold again. Watch for the next rain window closing—if we stay dry, the tier will slip to B by early June. Substrate moisture matters more than soil temp here because of drainage. **Hot tip:** Scan south-facing oak talus and blowdown runs first; duff pockets in those microsites retain moisture 2–3 days longer than exposed sand, and that's where your wine caps and half-frees will cluster.
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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⚠ 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.
0.50"
PRISM 4km · thru 05-27
Precip 14d
Observed precipitation from PRISM 4km gridded analysis, sampled at the region centroid through 2026-05-27. Used when no SNOTEL/SCAN station is mapped to this region.1.17"
PRISM 4km · thru 05-27
Soil Temp
64°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 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 6/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
All conditions met (soil 64°F, sustained 6/7 days above threshold, today 0.20 VWC, 7d avg 0.23 — moisture sustained)
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.