Hazard
Scale
The HikeMetrics Hazard Scale is a proprietary 5-level route danger classification system. Developed to provide hikers, expedition teams, and route planners with a precise, standardized tool for assessing objective risk across any terrain class on Earth.
Five Assessment Dimensions
Highest point elevation, altitude gain per day, and thin-air physiological load.
Scrambling grade, glacier travel, fixed-rope sections, and route-finding demands.
Seasonal weather window tightness, typhoon/storm exposure, and flash-flood probability.
Distance from road access, permit complexity, and evacuation time in hours.
Helicopter landing feasibility, ranger presence, and emergency communication coverage.
Level-by-Level Classification
Family-accessible, well-marked trails with minimal objective hazard.
- Elevation gain < 500m per day
- Clearly waymarked trail with infrastructure
- Self-rescue easily possible
- No technical sections required
Well-established multi-day routes for experienced recreational hikers.
- Elevation gain 500–1,200m per day
- Mostly maintained trail with some route-finding
- Basic navigation skills required
- Rescue services present in region
Sustained physical demand with sections of technical terrain.
- Elevation gain 1,200–2,000m per day
- Partial route-finding required
- Exposure to weather-dependent risk
- Multi-day wilderness camping typical
High technical grade. Proper safety gear and exposure experience required.
- Elevation gain 2,000–3,000m per day possible
- Technical scrambling / glacier travel
- High-altitude acclimatization required
- Remote sections without rescue access
Objective lethal hazard. For expeditionary teams only. Professional guide required.
- Death-zone altitude (>7,500m) or extreme exposure
- Glacier crevasse, avalanche, or rockfall risk
- No rescue infrastructure — self-sufficient teams only
- Expedition-grade equipment mandatory
Methodology
The Hazard Score is determined based on five measurable characteristics of each route: altitude and elevation gain per day, technical complexity, weather exposure, logistical isolation, and rescue accessibility. Each dimension contributes a maximum of 1 point to the total score, with altitude and technical complexity weighted 1.5x.
These characteristics are assessed using established, publicly available route parameters — such as highest point, total elevation gain, terrain grade, and distance from the nearest road access. The classification criteria are fixed and applied consistently across all routes in the index.
"We don't rate difficulty. We rate danger."
— HikeMetrics Classification System, v3.0