The base: effort distance
In trail running, 30 km with 2000 m of elevation gain does not feel like 30 km on the road. A simple field rule converts elevation into effort distance: 100 m of elevation gain adds roughly 1 km of flat equivalent.
Trail Race Time Calculator
Estimate your trail race time from distance, elevation gain, your reference flat pace, and terrain difficulty. The goal is not to predict the exact finish time, but to give you a realistic benchmark for planning your effort.
Terrain changes everything
A runnable fire road, technical singletrack, mud, or harsh downhills do not cost the same energy. Technical terrain slows pace, increases muscular fatigue, and demands more focus.
Coach advice
Use your reference flat pace as a sustainable pace, not your 5K personal best. For a long race, choose a comfortable pace and leave margin: trail running rewards control and consistency.
Estimate
Effort distance
- km
Terrain impact
+-%
Real average pace
- / km
Average speed
- km/h
Estimated time
-
Example: 42 km with 2500 m of elevation gain already equals 67 km-effort before terrain difficulty is even applied.
This estimate is only a benchmark. Sleep, weather, altitude, nutrition, downhill management, and your current fitness can all change the final result.
JOIN THE COMMUNITY
Join thousands of trail runners who train, progress, and share their passion every day. Download TrailRun and be part of the adventure.
Download on the App StoreF.A.Q
Everything you need to know about TrailRun training plans, workout tracking, and features.
Is TrailRun right for me if I am new to trail running?
Yes. Whether you are discovering trail running or aiming for an ultra, TrailRun creates a plan tailored to your level, goal, and daily life so you can progress without rushing.
How is my personalized training plan created?
When you sign up, you provide your level, goal, availability, and constraints. TrailRun then generates a balanced plan with running sessions, integrated strength training, clear targets, and explanations for every workout.
What is included in the free version?
The free version lets you get a personalized training plan, reschedule your workouts, create your own routes, sync your sessions with your watch, and benefit from coaching tips.
What does the Pro subscription really unlock?
Pro includes every free feature, daily guidance from an expert coach, plan adjustments when life gets in the way, precise workout targets, overtraining alerts, and in-depth stats analysis. You also get injury-prevention strength training, ideal routes with elevation profiles, 3D Flyover, and GPX export to your watch.
Can I move my sessions if my schedule changes?
Yes. You can reschedule your workouts when your availability changes. With Pro, your plan also adapts to unexpected events so your progress stays consistent without disrupting your preparation.
Can TrailRun help me avoid injuries or return after an injury?
TrailRun includes strength work, recovery, and progressive return-to-running programs designed by professionals. If you are injured or pain persists, the app does not replace medical advice.
Can I track my runs without a watch and find routes?
Yes. Built-in GPS tracking records your route, distance, pace, altitude, elevation gain, and elevation loss, even without a watch. You can also create your own routes, discover new ones, and use Pro to explore your course in a 3D Flyover.
Can I sync my workouts with my watch?
Yes. You can sync your TrailRun workouts with your Apple Watch and Suunto watch. Garmin compatibility is coming soon.
How does TrailRun adapt my training as I progress?
TrailRun uses your training history to adjust your training volume. Advanced statistics help you track changes in your training load, measure your progress, and better understand your coach's advice.
Can I cancel my subscription at any time?
Yes. You stay in control: your subscription can be canceled anytime from your App Store subscription settings.