$10 PP hand, played correctly?

[bix]

I was confused what the river bet represented for sure, but with a possible trip queens and a flush I figured I was beat. Should I have made a probe bet on the flop? Check flop, raise the turn? Thoughts on all streets appreciated.

Party Poker No-Limit Hold'em Tourney, Big Blind is t15 (8 handed) converter

Button (t775)
SB (t1315)
BB (t2430)
UTG (t1265)
UTG+1 (t925)
Hero (t785)
MP2 (t390)
CO (t115)

Preflop: Hero is MP1 with K[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/club.gif[/img].
UTG calls t15, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to t60</font>, <font color="#666666">4 folds</font>, BB calls t45, UTG calls t45.

Flop: (t187.50) Q[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, UTG checks, Hero checks.

Turn: (t187.50) 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">UTG bets t50</font>, Hero calls t50, BB calls t50.

River: (t337.50) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">UTG bets t350</font>, Hero folds, BB folds.

Final Pot: t687.50