Canoeing Houston Tx

Can canoeing in the marshes in Houston, TX? And how is Bayous in Houston?
There are several canoes sites along Buffalo Bayou between Dr. Pastor Bridge and downtown. There is also a canoe trip from Buffalo Bayou, click here: http://www.buffalobayou.org/buffbayoucanoe.html I do not know how many wetlands there in Houston. Perhaps Harris County Flood Control District knows http://www.hcfcd.org/
buffalo bayou regatta 2008 finale edition