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.
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
