Ray, Moore's bayou is just off the Arkansas river at Pendleton. You can put in the river and go down to the mouth of Moore's and go up the bayou, but I have been driving over the bridge and turning on 169 going toward Ark. post national memorial and putting in at the ramp at Moore's bayou rec. park. Then go downstream to where it opens up to the lake area. Here's a link to a map.
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Moore bayou rec. area - Google Maps