Grimstarr c/r's me on the river

[ike]

Full Tilt Poker
$25/$50 No Limit Hold'em Ring Game
5 Players
LegoPoker Hand Converter

<font color="black">Stack Sizes</font>
MP: $5044
CO: $5075
SB: $4525
BB: $6403
Hero (UTG): $6016

<font color="black">Preflop:</font> J[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/heart.gif[/img] ($75, 5 players)
<font color="red">Hero raises to $175</font>, MP folds, CO folds, SB folds, BB calls $125

<font color="black">Flop:</font> 2[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/club.gif[/img] ($375, 2 players)
BB checks, <font color="red">Hero bets $300</font>, BB calls $300

<font color="black">Turn:</font> 2[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/club.gif[/img] [6[img]/images/graemlins/diamond.gif[/img]] ($975, 2 players)
BB checks, Hero checks

<font color="black">River:</font> 2[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] [K[img]/images/graemlins/spade.gif[/img]] ($975, 2 players)
BB checks, <font color="red">Hero bets $900</font>, <font color="red">BB raises to $3,100</font>

I've got some thoughts about this hand but I'll save them for later. What do you think, call or fold? Anyone bet turn?