After reading the 2 threads: How to use へ (-e), に (-ni), まで (made) and の方 (no-hō) with destination and direction? and When going somewhere, is there any difference between e (へ) and ni (に)?
I would like to ask how would a native ask the question "Where are you going later?"
1) 後どこへ行くか?
2) 後どこまで?
3) ?
Context: john talking to mary 30 minutes before school ends.