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0–25 ft · VA🚗 Directions
Great Dismal Swamp National Wildlife Refuge — 112,000 acres straddling the VA-NC line. Atlantic white cedar, bald cypress, tupelo, red maple, and loblolly pine over peat soils. Lake Drummond at the center. Unique "pocosin" wetland ecology with Atlantic white cedar stands — a southern-appalachian species reaching its eastern limit here. Oyster mushroom year-round on dying cedars and tupelo; chicken-of-the-woods on water oak; summer chanterelles on drier hummocks.
Updated May 29, 4:21 AM MT
**Great Dismal Swamp NWR – Tier A Summary** You're looking at a genuinely prime window here: soil temps have cracked 70°F, moisture is locked in at sustained 0.33 VWC over two weeks, and all three flagged species are actively fruiting. The swamp's inherent hydrology is doing heavy lifting—this isn't marginal moisture, it's bedrock saturation. Oysters will dominate the play (decaying hardwoods everywhere), but don't sleep on the stinkhorns pushing up through the rot; the Psilocybe window is tight but real at these temps and soil conditions. The limiting factor is *speed*—you've got maybe 4–6 days before desiccation risk spikes once air temperatures climb and humidity drops with the next pressure system. The 0.85" in fourteen days is solid but not flush; the swamp's floor moisture will hold longer than upland sites, but you need to be selective about microhabitat (seepage zones, fallen logs, dense canopy cover). **Hot tip:** Hunt the northern red maple transition zones where standing water pools—oysters will be basketball-sized there and the Psilocybes fruit in the same organic-rich clay.
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.
0.85"
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.0.85"
PRISM 4km · thru 05-27
Soil Temp
71°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 71°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.33 — moisture sustained)
All conditions met (soil 71°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.33 — moisture sustained)
All conditions met (soil 71°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.33 — 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.