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600–1,100 ft · MI🚗 Directions
Hiawatha National Forest covering the eastern half of Michigan's Upper Peninsula — Lake Superior to Lake Michigan, including the Pictured Rocks lakeshore and the Tahquamenon-Two Hearted river systems. Northern hardwoods (sugar maple, yellow birch, beech) interlocking with conifer (white pine, white cedar, balsam fir, hemlock) and aspen-birch successional stands. Closes the gap left by the centroid of the existing "Upper Peninsula" region in the western UP. Yellow morels in aspen-birch flats late May; spring porcini (Boletus edulis var. clavipes) and king bolete in summer; chanterelles in hemlock-hardwood; lobster, matsutake, and hedgehog in conifer duff in fall.
Updated Aug 27, 4:24 AM MT
# Hiawatha NF / Eastern UP – S-Tier Flush (27 Aug 2026) This region is locked in a premium fruiting window: soil temperature has held steady at 64°F for a full week with consistent moisture (0.22 VWC), triggering simultaneous flushes across 70+ species. The moisture trigger is satisfied, there's zero drought stress, and substrate activation is complete—this is textbook peak season for late-summer diversity in the 600–1,100 ft band. No limiting factors exist; the only catch is that this window won't last more than 4–6 days before cooler nights begin to suppress gilled species and shift momentum toward fall polypores. Focus on *immediate* high-volume targets: **Chicken of the Woods, Hen of the Woods, Parasol Mushroom, and Giant Puffball** are in elite condition and bulk fast. The wood-decay guild (Turkey Tail, Artist's Conk, Birch Polypore, Beefsteak Polypore) is equally prime but slower to work, so scout those for stock. **Black Trumpets** are just waking—primordia aren't established yet, so leave them 2–3 days and return. Watch the overnight low; if it drops below 55°F tomorrow, inky caps and soft polypores will stall. The drought-free status means substrate will remain receptive, but the fleeting window is *thermal*, not moisture-based. **Hot tip:** Parasol and Shaggy Parasol are at peak button stage right now—hit old meadows and grassland margins in the morning before they expand; they'll bulk out and get tough by afternoon heat.
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.
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Hiawatha 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.
Precip 7d
Observed precipitation from PRISM 4km gridded analysis, sampled at the region centroid through 2026-08-25. Used when no SNOTEL/SCAN station is mapped to this region.0.08"
PRISM 4km · thru 08-25
Precip 14d
Observed precipitation from PRISM 4km gridded analysis, sampled at the region centroid through 2026-08-25. Used when no SNOTEL/SCAN station is mapped to this region.0.25"
PRISM 4km · thru 08-25
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 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
soil warming up (64°F today, only 3/7 days above threshold — mycelium activating, primordia not yet established), today 0.22 VWC, 7d avg 0.16
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 7/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
All conditions met (soil 64°F, sustained 5/7 days above threshold, today 0.22 VWC, 7d avg 0.16)
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.