Hero is BB with 6s2h.

CO is a donkey (same donkey as my two pair post), every other player is your standard 4-8 goofball. UTG is somewhat tight preflop.

Preflop: 7 limpers, SB completes, I check. (4.5 BB)

Flop: 5s 5h 3s

Checked to MP2 who bets, CO calls, Button calls, Sb calls, I call, UTG raises, everyone calls. (13.5 BB)

Turn 10s (5s 5h 3s)

UTG bets, UTG+1 calls, UTG+2 calls, MP2 calls, CO calls, Button calls, SB calls, I call. (21.5 BB)

River 4h

SB checks, I check, UTG bets, UTG+2 folds, MP2 folds, CO calls, Button folds, SB folds, I raise, UTG calls, CO calls. (27.5 BB)

Thoughts? I am ahead of CO 100% on the river, that is why I raised. I like checking the river here and raising depending on the action.

I'm down.

9 limpers at 4/8. Wow.

CO has only been calling, so you are likely ahead of him. But how agressive is he normally? Is he just calling along with a small flush here? That's a donkey play too...

This is just fine. You're drawing properly on every street, and the river is a great spot to go for a check/raise. In fact, the river isn't even close given the likely action with respect to your relative position, and the number of players in the hand with you, and the disguised nature of the draw you just hit. Your plan doesn't even have to work all that often for your check/raise to be absolutely correct.

Not close.

Wang

Ok, what if I check the river, UTG bets and someone else raises? Can I make a case for a fold? I'm assuming no...

I look over at UTG and see if he's loading up chips for a reraise...