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The lead group of the Unbound 200 riding a gravel road through the Flint Hills at dawn, dust rising behind them
Works withHammerhead

The AI cycling coach for your Hammerhead Karoo.

Season plans your season backward from your A event — Base, Build, Peak — and pushes every structured workout to your Karoo. Finished rides come back the moment you save them.

Get startedKaroo 3 · Karoo 2
Unbound Gravel 200

How it works

From your A event to your Hammerhead in three steps.

  1. 01

    Name your A event

    Give Season the race and the date. It plans the season back from race day: an aerobic base, an event-specific Build, one taper week, then race week — sized from the hours you actually ride.

  2. 02

    Connect Hammerhead

    One sign-in with your Hammerhead account. Season writes each planned workout to your Hammerhead dashboard on its date, and the Karoo picks it up on its next sync like any other workout.

  3. 03

    Ride, and it adapts

    Saved rides reach Season through Hammerhead's notification within seconds, with a nightly catch-up as the guarantee. The coach reads the file, scores the day, and adjusts what comes next.

On the head unit

What a Season plan looks like on a Karoo 3.

Structured workouts, not a to-do list

Warm-up, intervals, recoveries and cool-down, each step with a power target as a percentage of your FTP, so the Karoo guides the session step by step.

Edits update in place

Move a session, change the sets, swap a day: Season updates the same workout on the Karoo instead of piling up duplicates.

The house library

82s, Dirty Thirties, over-unders, 40/20s, sweet spot, the FTP tests and the durability long ride. Every key session arrives as a full ride with Z2 before and after, ready to follow.

Your data, judged honestly

Power and heart rate from the ride file feed the Execution score, aerobic decoupling, FTP estimates and the Season score. A number the coach cannot stand behind is flagged, never silently used.

Questions

Season and Hammerhead, answered.

Does Season work with the Karoo 3 and the Karoo 2?

Yes. Season connects to your Hammerhead account and writes workouts through the Hammerhead dashboard, which both units sync from. Any Karoo that syncs with the dashboard receives its workouts.

How do workouts get onto my Karoo?

Season creates each planned workout on its date in your Hammerhead dashboard. The Karoo picks it up on its next sync, exactly as it does for a workout you add on the dashboard yourself. Nothing to export or upload.

Do my rides sync back to Season?

Yes. Hammerhead notifies Season when a ride is saved, usually within seconds, and a nightly catch-up covers anything missed. You can also press Sync in Season at any time.

Is Season free?

Every plan starts with a free trial: 7 days on Season PRO ($8.99 a month) or 3 days on Season Lite ($3.99 a month). Cancel before the trial ends and you pay nothing.

Can I use Season alongside Intervals.icu or Wahoo?

Yes. Connect any or all of them. Intervals.icu can also carry rides in from Garmin and other head units.

Is Season a real coach or an AI?

Season is an AI coach built on Joe Friel's periodization, with the rules it must not break written into the app itself: how big a week may be, when intensity may start, what a taper keeps. Human coaches can also run their athletes through Season.

Name your A event.

Connect your Hammerhead, give Season the date, and the first week is on your head unit today.

Get started

Also works with Wahoo and Intervals.icu