Custom gravel & MTB race plans

Does yourrace goaladd up?

Got a race on the calendar and a goal in your head? Dirt Math tells you whether it adds up, then builds the plan to make it happen.

Get early access → See how it works
Dirt Math goal screen: Sub-9 at Leadville is possible, needed versus current power
Leadville 100Unbound 200Firecracker 50SBT GRVLMid SouthBig SugarWhiskey Off-RoadBelgian Waffle RideCrusher in the TusharBailey HundoBirkebeinerrittetThe Rift Leadville 100Unbound 200Firecracker 50SBT GRVLMid SouthBig SugarWhiskey Off-RoadBelgian Waffle RideCrusher in the TusharBailey HundoBirkebeinerrittetThe Rift
The math

Needed vs. current

Pick a race and a goal: a finish time, or a place in your age group from past results. Dirt Math models every climb, descent and surface on the course and gives you one honest answer.

Sub-9 is possible.

You need to average 177 W where you train, 59% of your FTP, for 8 hours 51 minutes of riding at 10,000 ft.

Altitude adjustedSurface by segmentHike-a-bikeFinish range ±6%
Needed
177W
Current
169W
Gap
+4.6%
How it works

Race first. Then the plan.

01

Pick your race

Leadville, Unbound, Firecracker and more are ready to go, or upload the course GPX. Rate how technical the trail is.

02

Add your numbers

FTP, weight and where you train, or connect Intervals.icu. Add past race files and Dirt Math learns how you really ride.

03

Set the goal

Sub-9, top 10 overall, top 20% of your age group. See what it takes, where the gap is, and build the plan to close it.

Where is the gap?

See exactly where the race is won

Section by section, see the watts each climb takes, compared with your own race file. Know whether it's the climbs, the descents or the last three hours.

  • Every key climb with its target power
  • Your past race file side by side with the plan
  • Late-race fade measured, not guessed
By section: target power for every climb and descent, compared with your race file
Race demands

Your profile vs. what the race asks

Every race type rated on anaerobic, VO2 max, FTP and durability, and your power profile drawn right over it. Leadville is a durability race. Short track isn't.

  • 13 race types from a gravel and MTB coach's chart
  • Sprint to five-hour power from your last year
  • Your limiter becomes your training focus
Race demands spider chart
Custom training plans

A plan built back from race day

Blocks that work one intensity at a time, weaknesses early and race-specific work late. Two or three quality sessions a week, structured on weekdays and outside at the weekend.

  • Fits your days, hours and indoor or outdoor riding
  • Durability closest to the race for long events
  • Sends sessions to your Intervals.icu calendar
A training plan block with this week's sessions
Every session, explained

Know why, not just what

Targets as power, heart rate and feel, with the reason each workout is in your plan. Seven standard zones and nothing you have to decode.

  • Warm-ups and cool-downs built in
  • Ranges that progress week by week
  • Move sessions around your life
A VO2 max workout with power targets
Built for dirt

Road math doesn't work here

Gravel and singletrack aren't pavement. Dirt Math models what changes off-road, from rolling resistance by surface to the speed limit a rocky trail sets, whatever your watts.

1–5

Technical trail scale. Rough singletrack sets its own speed on the flats and descents.

10K'

Altitude. The same watts feel harder at race elevation than where you train.

Every mile

Surface by segment, from map data: pavement, gravel road or rough dirt.

You

Your descending, cornering and pacing, learned from race files on similar trail.

Built by a coach
Built by a mountain bike and gravel coach, Dirt Math starts with the race, not a generic plan. It looks at what the course really demands: the climbs, the surges, the steep low-cadence grinding and the hours in the saddle. Then it compares those demands to what you can do today.
FAQ

Questions

Is it for gravel or mountain bike racing?

Both. Pick your bike for each goal: gravel and MTB have their own weights, tyres, positions and descending, and courses are rated from smooth gravel to very technical singletrack.

Do I need a power meter?

You need an FTP and your weight. Past race files with power make it much more accurate, because Dirt Math learns how you pace, descend and corner from them.

What if my race isn't in the catalog?

Upload the course GPX. Dirt Math corrects the elevation from terrain data, splits the course and models it the same way.

Does it connect to my training apps?

Intervals.icu today: your FTP, weight, power curve and recent riding come in, and plan sessions go out to your calendar.

When can I get it?

Dirt Math is in beta on iPhone. Ask for early access below and we'll send you an invite.

Dirt Math logo

Do the math

Dirt Math is in beta on iPhone. Tell us your next race and we'll send you an invite.

Get early access →