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1,300–1,550 ft · SD🚗 Directions
Glacial moraine hills in the southeast corner of SD — Newton Hills SP, Union Grove SP, Big Sioux Recreation Area along the Big Sioux River. Bur oak, basswood, American elm, and green ash on the rolling moraine and river-bluff terrain. Eastern deciduous forest at its northwest extension. Good spring morel hunting in oak-basswood draws.
Updated Jul 13, 4:18 AM MT
Newton Hills is firing on all cylinders—S-tier is earned. You've got 77°F soil, 3.89" over 14 days, and sustained VWC right in the sweet zone. The two-week precipitation window nailed it: enough moisture to trigger fruiting, zero drought stress, and zero limiting factors beyond moderate desiccation risk (which is negligible in mid-July humidity). The roster is absurdly wide here. Prioritize the culinary wins: Chicken of the Woods on dead hardwood, Wine Caps in open grassland edges, Oysters on stumps, and boletes (Aspen, Birch, Frost's) under canopy—all triggered simultaneously. The toxic/medicinal tier (Amanitas, Coker's, Artist's Conk) is also live, so ID discipline is non-negotiable. Desiccation risk is your only watch point. With last week's 0.05" rainfall, this window won't last forever—expect a 5–7 day fruiting peak before soil moisture drops. Polypores and woody saprophytes (Chaga, Turkey Tail, Jelly Ear) are slower-developing insurance policies; ground mushrooms need attention now. Hot tip: Hit sun-exposed south-facing slopes for Wine Caps and Fairy Ring Champignon before Thursday—they'll bolt or desiccate fastest in direct 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.
Precip 7d
Log your find on iNaturalist to help the community and get expert ID assistance. Photos, location, and habitat notes all help with identification.
7 sites
⚠ 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.
0.05"
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.3.89"
PRISM 4km · thru 07-11
Soil Temp
77°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 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
All conditions met (soil 77°F, sustained 7/7 days above threshold, today 0.15 VWC, 7d avg 0.17)
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.