What workout produces the best runner's high?

Easy run after a vape sesh.

marathon on a track when you get lapped but come back to win

ganja mile

That Death Valley race. Seriously, though, I always find that I enjoy a mid-length (8-10 for me) workout where I slowly accelerate throughout the run feels best. I feel all the paces, marathon, half marathon, 10k, 5k, 3k mile, and finish up all-out for as long as I can handle it. Feels good every time.

anything 10 mile + sucks as it takes too much out of you. 5Ks are the best. Any time Vo2 max is involved runners highs are great. Must be the low oxygen

Beer mile

Any workout that builds speed reserve

Frankie Says wrote:

marathon on a track when you get lapped but come back to win

Actually now that I've thought about it I think this^^ is the right answer.

Steady-state run of 45+ min after a very, very slow warm up.