Current level: beginner.

Can run about 500m before feeling tired. Distance record >4years ago: 11km in 70minutes.

Success means:

running a marathon distance without stopping or slowing down to walk. It does not have to be an official event.

All attempts to complete a marathon also count towards the training-time-tally.

Updates and the tally in the comments.

(I might do a spreadsheet)

If my total running time reaches 200h the market resolves NO.

If I complete marathon sooner, resolves YES.

I have found a nice 10k loop, and it motivated me: hey, just 4 and a bit circles on the track.

100 mana limit order at 15%.