Understanding Trail Gradient
Gradient is expressed as a percentage: (vertical rise / horizontal run) × 100. A 20% gradient means you gain 20m of elevation for every 100m of horizontal distance traveled. The steepness directly affects energy expenditure, descent control, and avalanche risk.
Gradient Reference Scale
- 0–5%: Nearly flat, wheelchair accessible in places
- 5–10%: Gentle grade, comfortable for most hikers
- 10–15%: Moderate grade, noticeable exertion on long hikes
- 15–20%: Steep, requires good fitness
- 20–30%: Very steep, difficult for loaded packs
- 30–45%: Extremely steep, scrambling territory
- 45%+: Near-vertical, serious climbing terrain
💡 Rule of ThumbMost established mountain trails maintain gradients below 20%. Grades exceeding 30% are typically found only on scrambling routes or near-technical sections.