Am I a mid-distance athlete?

Depends ... Age? Sex? Training background?

18, Male, never ran over 35 mpw

So, you did this with very little training. Pretty good. Would be interesting to see where training takes you. But yes, basic building blocks for mid distance are there.

Hard to know just off of PRs without much training insight, but probably not. 55 just isn't fast enough. Now if you told me you've never done any form of real speed work, and you only do long reps like 1k and mile repeats, then maybe there's a chance. To be a competitive MD runner you'll just have to have a lil more juice.

While 2:03 is technically better than your 1600 & 3200 (more World Athletics points, fewer NCAA women and 30 year old dudes on this board capable of it), given your age, mileage and 400 time I’m guessing you have greater potential at 3200 and up. You’d need to raise your mileage to reach that potential.

The typical high school 'distance guy' can't break 60 & 2:04, so by definition your 55 2:03 makes you more mid distance. Exception would be if you were great in xc and 5 mile, 10k road races.

Of course on the LRC board you are only good if you go 50, 1:50, 4:10, so that's what you should be working toward.

But what type of workouts do (did) you do?

Workouts are mostly 200's, with occasional 400's

Homo says what?

This is about right. Where I'm at....all of these marks will place you equally high in the local high school scene. In our league:

55 would be top 3

2:03 would be #3 or 4

4:38 would be # 5

9:57 would be #1

So probably workouts geared towards the 800 and very few V02 max workouts. In that case then you might have much more potential in the longer events.