How can I read full course data?

You cannot read „full course data“, but you can read „remaing distance to destination“ on a loaded course.

Activity.Info:

https://developer.garmin.com/connect-iq/api-docs/Toybox/Activity/Info.html

var distanceToDestination as Lang.Float or Null

Thanks
How can I emulate this field using the simulator?
And this is the only information I can get? Because I though about something more precise.

Under „Navigation“ set „distance to destination“.

(but it does not decrease during the activity)

forums.garmin.com/.../distancetodestination-meaning

And is it the only information available to apps? As it is not the perfect solution for me

Look in the docs (the above link), that's the data you have

2852110 said:

I want to create a smart race predictor, so I want to read the route data and give the user in real time how the pace is according to his goal time, and how much seconds the user is ahead or behind now.
For example if the user want to run 10k in 40 minutes, and he run 8k in 30 minutes, it will show that 120 seconds ahead.

But you didn't explain how you would use route data to achieve that. Were you thinking of using elevation data to adjust your prediction (accounting for faster/slower paces due to downhill/uphill segments)?

In that case you could use elevationAtDestination and altitude, in ActivityInfo. Of course that's not perfect as it doesn't give you information about individual climbs and descents.

Otherwise it seems to me all you need is:

- Goal distance (user input)

- Goal time (user input)

- Current distance: ActivityInfo.elapsedDistance

- Current timer time: ActivityInfo.timerTime

Using elapsedDistance and timerTime, you can calculate the recent average speed (for the last X minutes), to use for your race prediction. Ofc you could also use the average speed for the entire activity, but it might be more accurate to use a recent average speed instead (I think this is what Garmin does for its own live prediction in the Set a Target feature.