User talk:50.35.130.178

The article on American shad states that apparently the longest spawning run is in the St John's River in Florida where shad have been found 375 miles upriver. The Wikipedia article on the St John's River in Florida states that it is only 310 miles long.

The same article states that shad go upstream of Priest Rapids Dam in the Columbia River in Washington. According to the Wikipedia article on Priest Rapids Dam, it is 397 miles upriver from the mouth of the Columbia. Fish are counted at the fish ladders at the dams on the Columbia River. According to the fish count data, shad have passed over Priest Rapids Dam every year since 2010 (I didn't check earlier years), and 79,000 went over this dam in 2018. Some even go over Wanapum Dam, which is the next dam upstream. In fact, there have been years when shad went over Rock Island Dam on the Columbia, which according to Wikipedia is 453 miles upriver of the mouth.

I have also personally caught a few shad in the tail race of Priest Rapids Dam.