Is it possible to automatically determine the lactate threshold based on my all pulse training?
I’m not sure hat you are asking. You know what LTR heart rate is, so you also know there is a zone or percent (of max) definition, or a ‘find out the hard way’ method of going all out for one hour without collapsing.
There’s a variation on that theme that will take you only 30 minutes, but then it’s a little less accurate again.
Anyway, most models, here too I believe *, use the zone approach - that is not exact science, but over time, given that you have enough data and experience, it will be a good indication.
Edit *: it’s Zone 4 on the Totals page…
I mean to automatically detect the highest average heart rate for 30 minutes of all workouts.
Well yes, but that’s not your LTR. I’m not sure if @david can implement that, like for instance the best 20 minute power effort, although that is a per ride thing, not for the total.
Your totals are reflected in other numbers, but why specifically a 30 minute HR of all rides? You’re not only doing 30 minute LTR tests every workout, are you?
But you can always get an API key and do some stuff yourself 
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You can get that from the activity HR page from any activity with HR data from the HR duration curve:
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Forgot that, which is already taking more than just one effort into the mix. Still, I fail to see the usefulness of it, and from the OP’s initial LTR question you should move the slider to 1 hour, but then again, we all have our own needs
Does not work as well if you run too:
My cycling LTHR is 175 and running LTHR is 182. But it is quite possible to go above those in the race conditions.
I wonder what algorithm is used by TrainingPeaks and Garmin devices 
You might have mentioned that to begin with…
As a 100% NOT runner, I tend to skip everything on this forum that is related to running (with power), but I know it creates all sorts of challenges.
I’m counting on @david to help you out here…
If you didn’t see the announcement …
I usually consider 5~10% less of my Running LTHR to my Cycling LTHR (As you can see from your data, it’s not far off).
In races (specially short ones), it’s quite common that you spend more time above your thresholds (HR and Pace). That’s why you don’t use your best 10k values as thresholds if you can run it under 45’ (there is already some literature about that). Also, if you wanna be more conservative, I would reduce around 5% of your average heart rate threshold test (Joe Friel method) to be more conservative - if you are using these data as guideline for your training.
Anyway, in my opinion, even more important than knowing your anaerobic threshold (LT2), it’s setting correctly your aerobic threshold (LT1 - around 90% of your LT2 ), since most of the time of training should be done below that value.
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