Long run important for 2 milers?

How long is long for you? If 6 miles is considered a long run, then I'd say it's very important to your long term aerobic development. If 20 miles is a long run, then you probably have room to cut back in that department. Your average weekly mileage will also play a role here - the higher your average, the less important the long run is, generally speaking.

When doing lots of other workouts/races, I'd recommend taking the long run as an easy day. Not just easy pace, but easy total effort, so don't be afraid to cut it short if you're feeling bad. When in a base phase without much other intensity, I think the long run can be more flexible, including planned faster segments or even running the whole thing as a relaxed, freestyle fartlek.

It largely depends on the phase of the season that you are in. The 2 mile is more comparable to the 5K than the mile in terms of energy demands, so the long overall is a large component of training.

If you are in a base/aerobic development phase, I'd say that it is definitely important to get in on a weekly basis.

If you are in a early season phase with less important races, you should still shoot to get it in weekly, but is okay to get 2 out of every 3 weeks.

If you are in a mid-season phase with races, hitting a long run every other week is a good goal.

If you are in a end-of-season phase (typically last 3-4 weeks), I find that the long run is not necessary as the benefits from a long run typically come 3-4 weeks down the line from when completed, and can only make you feel less sharp for your key races.

With all that said, if you have a coach that you are working with, listen to him/her. If it a concern that you have, have an open discussion with your coach as they should be willing to make adjustments to training based on an individual athlete's needs.

There is no cap to this as some runners can handle larger workloads without breaking down. At a minimum, I’d say work up to 45 min (continuous) at a strong, steady clip if you’re not there already.

Depends on what you mean by “long runs” -The WR holder(J. Ingebrigtsen) has only one “long run” a week (easy) -20 km (maybe recently increased to a half marathon, I’m not sure..).

Jog 10 the day after a race. On non race weekends run at an easy but aerobic pace (i.e. 5k + 90s)

It's very important for events beyond 10k; but for 10k and below, it's not as important as it's made out to be.

I'd prioritise being recovered for workouts, and trying to increase your overall mileage in a way that tires you out the least.

Remember, Jakob never runs for more than 75 minutes at a time.

Are you racing all ready? In racing season you probably only need 1 every 2 or 3 weeks. In base phase you should be running 1-2 workouts and a long run each week. Like a tempo, an interval session and a long run. Neither workout should be super hard, especially the intervals or you'll be burned out by the end of track season. As you become more experienced you should start speeding up your long runs. Something like 10-12 miles, though I have no idea where you are at right now. How many mpw are you running and what are your prs? I like to run the first half at a fairly easy pace and then speeding up on the way back.

I think you should hit double digits at least once a week if not 2-3 if you’re really going all in on 3k-5k training as a highschooler.

Making a 3k/3200m feel like a short race is the best thing you can do to get better in my experience. Tempos of 3-5 miles and easy runs of 8-12 miles will get you there. Probably better to go for a 10 mile easy run at 8:00+ pace than a 6 mile run at 7:15-7:30, keep that in mind.