Evaluate current trail conditions including weather, snow line, river crossings, exposure, and trail maintenance status for safety decision-making. Produces a GREEN/YELLOW/RED safety rating with actionable go/no-go recommendations. Use the day before or morning of a planned hike, during tour planning to assess seasonal viability, after unexpected weather changes on a multi-day tour, when reports suggest trail damage or closures, or before committing to an alpine or exposed route.
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name
assess-trail-conditions
locale
caveman-ultra
source_locale
en
source_commit
82c77053
translator
Julius Brussee homage — caveman
translation_date
2026-04-19
description
Evaluate current trail conditions including weather, snow line, river crossings, exposure, and trail maintenance status for safety decision-making. Produces a GREEN/YELLOW/RED safety rating with actionable go/no-go recommendations. Use the day before or morning of a planned hike, during tour planning to assess seasonal viability, after unexpected weather changes on a multi-day tour, when reports suggest trail damage or closures, or before committing to an alpine or exposed route.
→ Weather from ≥2 independent srcs + altitude-specific for lowest + highest route pts.
If err: Detailed mountain forecasts unavail for region → general forecasts + altitude adjustments: temp drops ~6.5 C per 1000 m gain, wind increases w/ altitude + exposure. Forecasts disagree → plan worse prediction.
Step 2: Assess Terrain
Current state of trail surface, snow, water, exposure hazards.
Terrain Condition Factors:
┌──────────────────────┬─────────────────────────────────────────┐
│ Factor │ Assessment Method │
├──────────────────────┼─────────────────────────────────────────┤
│ Snow cover │ Compare current snow line to route's │
│ │ highest point. If route goes above snow │
│ │ line, assess whether snow gear is │
│ │ needed and if the group has it. │
├──────────────────────┼─────────────────────────────────────────┤
│ Ice │ North-facing slopes above freezing │
│ │ level may retain ice even in summer. │
│ │ Check recent overnight temps. │
├──────────────────────┼─────────────────────────────────────────┤
│ River/stream │ Check recent rainfall totals. Rivers │
│ crossings │ can be impassable 24-48 hrs after │
│ │ heavy rain or during snowmelt peak. │
├──────────────────────┼─────────────────────────────────────────┤
│ Rockfall zones │ More active after freeze-thaw cycles │
│ │ and rain. Early morning passage is │
│ │ safer (frozen in place overnight). │
├──────────────────────┼─────────────────────────────────────────┤
│ Mud/erosion │ Recent rain makes steep trails │
│ │ slippery and increases fall risk. │
│ │ Poles recommended. │
├──────────────────────┼─────────────────────────────────────────┤
│ Exposure (ridges, │ Wind speed determines whether exposed │
│ cliff paths) │ sections are safe. Gusts >60 km/h make │
│ │ exposed ridges dangerous. │
└──────────────────────┴─────────────────────────────────────────┘
Data srcs for terrain:
Recent trip reports (forums, club sites)
Hut warden reports (call nearest)
Webcams at/near trail
Avalanche bulletins (snow + terrain info even summer)
Trail maintenance authorities (nat park offices, Alpenverein)
→ Terrain assessment per significant hazard pt, current data ≤48 hr old.
If err: Current data unavail (remote, no recent reports) → assume worse than avg for season. Contact nearest staffed hut or mountain rescue for local knowledge.
Step 3: Eval Trail Status
Closures, diversions, maintenance on planned route.
Trail Status Sources:
┌────────────────────────┬──────────────────────────────────────┐
│ Source │ Information type │
├────────────────────────┼──────────────────────────────────────┤
│ Official trail portals │ Closures, diversions, damage reports │
│ (regional/national) │ │
├────────────────────────┼──────────────────────────────────────┤
│ National park websites │ Seasonal closures (wildlife, snow) │
├────────────────────────┼──────────────────────────────────────┤
│ Hut websites/phones │ Hut opening dates, path conditions │
├────────────────────────┼──────────────────────────────────────┤
│ Local tourism offices │ Recent trail work, event closures │
├────────────────────────┼──────────────────────────────────────┤
│ Hiking community │ Unofficial reports, photos, GPX │
│ (forums, apps) │ tracks showing actual paths taken │
└────────────────────────┴──────────────────────────────────────┘
Check for:
Full closures: Trail impassable or legally closed (wildlife protection, construction)
Partial closures: Sections closed w/ official diversions
Seasonal closures: Not yet open (snow, hut not staffed)
Event impacts: Races, military exercises, hunting seasons
→ Confirmed trail status (open, partially closed, closed) + diversions mapped + time impact estimated.
If err: Status can't be confirmed → plan potential diversions. Carry detailed map (not just trail app route) → alternatives navigable on spot. Listed closed → respect even if appears passable.
Step 4: Rate Safety Level
Combine all into overall safety rating.
Safety Rating Criteria:
┌─────────┬────────────────────────────────────────────────────┐
│ Rating │ Criteria │
├─────────┼────────────────────────────────────────────────────┤
│ GREEN │ All of: │
│ │ - Weather forecast stable, no severe warnings │
│ │ - Trail open with no significant hazards │
│ │ - Terrain conditions normal for the season │
│ │ - Route within group's capability │
│ │ - Visibility good (>5 km at altitude) │
├─────────┼────────────────────────────────────────────────────┤
│ YELLOW │ One or more of: │
│ │ - Afternoon thunderstorm risk (>30%) │
│ │ - Wind gusts 40-60 km/h on exposed sections │
│ │ - Trail partially closed (diversion available) │
│ │ - Snow patches requiring care but no special gear │
│ │ - Recent rain making terrain slippery │
│ │ - Route near the group's capability limit │
│ │ Decision: Proceed with extra caution and backup │
├─────────┼────────────────────────────────────────────────────┤
│ RED │ Any of: │
│ │ - Severe weather warning (storm, heavy snow) │
│ │ - Wind gusts >60 km/h on exposed terrain │
│ │ - Trail closed (no safe diversion) │
│ │ - Snow/ice requiring gear the group lacks │
│ │ - Visibility <1 km on unmarked/exposed terrain │
│ │ - River crossings at dangerous water levels │
│ │ - Avalanche danger level 3+ on route │
│ │ - Route clearly exceeds group's capability │
│ │ Decision: Do not proceed. Choose alternative or │
│ │ postpone. │
└─────────┴────────────────────────────────────────────────────┘
YELLOW ratings → specific mitigation actions:
Early start → beat afternoon weather
Turnaround time if conditions worsen
Specific sections to monitor closely
Communication plan if group separates
→ Clear GREEN/YELLOW/RED + specific justification. YELLOW → actionable mitigation + defined trigger pts for abort.
If err: Inconclusive (insufficient data) → treat YELLOW min. Uncertainty should increase caution. Any single RED → overall RED regardless of others.
Step 5: Generate Report
Concise actionable report.
Conditions Report Template:
═══════════════════════════════════════════════
TRAIL CONDITIONS REPORT
───────────────────────────────────────────────
Trail: [Name / Route Number]
Date: [Assessment date and time]
Hike date:[Planned date]
Rating: [GREEN / YELLOW / RED]
───────────────────────────────────────────────
WEATHER SUMMARY
Valley: [temp]C, [wind] km/h, [precipitation]
Summit: [temp]C, [wind] km/h, [precipitation]
Outlook: [trend: improving / stable / deteriorating]
Alerts: [any active warnings]
TERRAIN CONDITIONS
Snow line: [elevation] m ([above/below] route max)
Trail surface: [dry / wet / muddy / icy / snow-covered]
Water levels: [normal / elevated / dangerous]
Rockfall risk: [low / moderate / high]
TRAIL STATUS
Status: [open / partially closed / closed]
Diversions: [none / details]
Known issues:[list any damage or hazards]
RECOMMENDATIONS
[Specific actions based on rating:]
- [e.g., Start by 06:00 to clear ridge before noon]
- [e.g., Carry microspikes for north-facing traverse]
- [e.g., Turnaround by 13:00 if clouds build]
DECISION
[GO / GO WITH CAUTION / NO-GO]
[Reasoning in 1-2 sentences]
═══════════════════════════════════════════════
→ Complete dated conditions report enabling informed go/no-go. Shareable w/ all group + understandable no additional ctx.
If err: Can't complete report (key data unavail) → state what unknown + how affects decision. Incomplete + acknowledged gaps safer than false certainty.
Check
Weather from ≥2 independent srcs
Altitude-specific forecasts (not just valley)
Terrain assessed all key hazard pts
Trail status verified (open/closed/diversions)
Safety rating assigned + clear justification
Mitigations defined for YELLOW
Report complete + dated
Report shared w/ all group members
Assessment ≤24 hr old at departure
Traps
Valley weather bias: Clear valley means nothing at altitude. Always check summit-level; dramatically different 1000 m higher.
Stale data: Report from 3 days unreliable. Mountain conditions change rapidly. Reassess morning of hike.
Optimism bias: Desire → rationalize marginal conditions. Argue case for going → probably not good enough.
Single-src reliance: 1 forecast can be wrong. Cross-check ≥2 srcs, weight local/mountain-specific > general.
Ignore trend: Current acceptable but deteriorating → more caution than snapshot suggests.
Social pressure override: Never proceed because group eager or long drive. Mountain will be there next week; you might not.
Snow line miscalc: Reported snow line = avg. North-facing slopes hold snow 200-500 m below reported.
→
plan-hiking-tour — uses this assessment as input for safety eval step
check-hiking-gear — gear adjustments per assessed conditions (microspikes, extra layers)
plan-tour-route — trail condition awareness for broader tour planning
create-spatial-visualization — visualize hazard zones on map overlay
