Plan It For Real
This score lives on every trip you plan
Every Ridgefold trip computes this rating live from the real route as you drag waypoints, with the same math. Drop your camps, snap to real trails, and watch the difficulty score update in real time.
- True distance and elevation pulled from the route you draw
- Live difficulty score updates as you move camps around
- Per-day miles, gain, and hiking time between each campsite
- Free 3D terrain, permit info, and GPX in and out
Free account, no credit card required
How the score works
The rating uses an effort-miles model inspired by Naismith's rule of thumb: every 1,000 ft of climbing costs roughly the same energy as one extra mile of flat hiking. Total distance plus that converted climbing becomes your effort-miles, a single number that represents how much work the route asks of you.
From there, two more factors layer in. First, days out: longer trips accumulate fatigue even when individual days are gentle, so each night adds a small amount to the score. Second, the hardest day: a trip where all the climbing is crammed into one pass is harder than the same total spread evenly across a week.
Finally, altitude and terrain apply flat bonuses. Above 10,000 ft the air thins and aerobic output drops. Above 12,000 ft acclimatization becomes a real planning concern. Off-trail travel, even for short sections, adds navigation effort, slower footing, and greater energy cost on top of the mileage.
The four bands (Easy, Moderate, Hard, Strenuous) were calibrated against hundreds of real trails so the label matches how most experienced hikers describe the trip. When you plan a trip in Ridgefold, your live route produces the same score automatically.
Questions
How is backpacking difficulty calculated?
This calculator uses an effort-miles model: total distance plus climbing converted to equivalent flat miles (every 1,000 ft of gain counts as one extra effort-mile). It then adds a factor for trip length, the hardest single day, altitude, and off-trail terrain. The same formula runs inside Ridgefold for every trip you plan.
What makes a backpacking trip strenuous?
High total mileage, lots of elevation gain, many nights out, a single punishing day (the "big push"), sustained altitude above 10,000 ft, or significant off-trail travel. Any two of these in combination can push a trip from Hard into Strenuous territory.
Is a 50-mile backpacking trip hard?
It depends on the other factors. A flat, low-elevation 50-mile trip spread over 7 days (about 7 miles/day) is Moderate. The same 50 miles compressed into 4 days with 12,000 ft of gain at high altitude lands solidly in Strenuous. Use this calculator to see how the combination plays out.
Does altitude affect backpacking difficulty?
Yes, significantly. Above 10,000 ft thinner air reduces your aerobic output, climbs feel harder, and you may need acclimatization days. This calculator adds a flat bonus to the score above 10,000 ft and again above 12,000 ft, matching the adjustment in the Ridgefold planner.