That looks so much fun. are some of those people running to the side of the mud puddles for. I come on. You just waded thigh deep through a creek. Go for it! I would try to get as muddy as possible.
Ward Pound Reservation in Cross River NY (a little above NYC in Westchester County, I shoot over from CT and it's a short drive), it's a 10k...and this year they added a surprise chest deep river crossing to the others...it was GREAT! Demand has gotton high as it caps at 900 or 1,000 I believe so for the first year they're talking about a lottery as it sold out in hours when registration opened...it's usually last Sunday in April, but due to Easter is the first in May...& I'm with you why dance around the mud...however I will say they have an area they describe as 'swampy mud things' and my shoe got sucked off and took a bit to find and put back on so sometimes it's best when it's shin deep to strategize... http://www.leathermansloop.org/