The longest ace I saw was about 389 according to the tee sign. The distance seemed about right give or take a bit.
Longest Ace I hit was 275 according to the tee sign, which seemed about right.
The coolest looking/luckiest ace I saw was a guy playing solo round threw a disc which ended up grazing a light pole about 75 feet off the tee, which caused more spin on the disc and a funky flight which went into the basket(354 feet according to the tee sign, also slightly downhill). According to the guy, he was only throwing about 260-280 feet off the tee, which makes it even more awesome. The next year or so, I actually did the same glance off the pole and parked it. Unfortunately no ace for me.