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9,000–12,000 ft · CO🚗 Directions
High-elevation Front Range corridor. Prime king bolete and hawk's wing habitat above 10,000 ft. Can hold snow into June. Spectacular terrain.
Updated Aug 27, 4:02 AM MT
# Guanella Pass Corridor – S Tier (Late Aug 2026) This corridor is firing on all cylinders: sustained moisture (0.29 VWC holding steady over 7 days) combined with reliable 51°F soil temps has unlocked a 30+ species flush across boletes, milk caps, corals, and choice edibles. King Boletes and Hedgehogs are the headline acts—textbook conditions met for both—but don't sleep on Lobster Mushrooms, Sweet Tooth, and the full slate of Russulas popping simultaneously at this elevation. The limiting factor is moderate desiccation risk, which means this window is *now*; the low SWE (10% of normal) signals the moisture pulse won't sustain past another week or two without fresh precip. Watch the next 48–72 hours for fungal emergence; any drying trend will collapse the moderate-tier species (Cauliflower, Reishi, stinkhorns) within days. The high-tier roster is more resilient but still dependent on soil VWC staying above 0.27. **Hot tip:** Target north-aspect conifer stands where soil stays coolest and dries slowest—that's where your best bolete and hedgehog density will hold longest.
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.
18 sites
High-elevation camp on the pass road. Prime king bolete territory.
Arapaho & Roosevelt National Forests Pawnee NG
Pike-San Isabel National Forests
Pike-San Isabel National Forests
Arapaho & Roosevelt National Forests Pawnee NG
8 sites
Small campground near Georgetown. Good staging point.
Arapaho & Roosevelt National Forests Pawnee NG
Arapaho & Roosevelt National Forests Pawnee NG
Pike-San Isabel National Forests
Pike-San Isabel National Forests
⚠ 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.
0.31"
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.1.49"
PRISM 4km · thru 08-25
Soil Temp
51°F
SWE
Snow Water Equivalent — how much water is in the snowpack vs. normal. Declining SWE means snowmelt is adding moisture to the soil.10%
Drought
None
Snowmelt
steady
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
soil temp marginal (51°F vs 58°F min, 0/7 days above), today 0.29 VWC, 7d avg 0.27 — moisture sustained
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
soil temp marginal (51°F vs 55°F min, 0/7 days above), today 0.29 VWC, 7d avg 0.27 — moisture sustained
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
soil temp marginal (51°F vs 55°F min, 0/7 days above), today 0.29 VWC, 7d avg 0.27 — moisture sustained
All conditions met (soil 51°F, sustained 7/7 days above threshold, today 0.29 VWC, 7d avg 0.27 — moisture sustained)
soil temp marginal (51°F vs 55°F min, 0/7 days above), today 0.29 VWC, 7d avg 0.27 — moisture sustained
soil temp marginal (51°F vs 60°F min, 0/7 days above), today 0.29 VWC, 7d avg 0.27 — moisture sustained
soil temp marginal (51°F vs 60°F min, 0/7 days above), today 0.29 VWC, 7d avg 0.27 — moisture sustained
soil temp marginal (51°F vs 55°F min, 0/7 days above), today 0.29 VWC, 7d avg 0.27 — 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.