flow length tool to calculate the longest stream in a watershed

[msay]

hey all

i have been reading everywhere that "A primary use of the Flow Length tool is to calculate the length of the longest flow path within a given basin'
well i did all the steps until i got the flow length raster.
what is the next step in order to obtain the longest flow or stream in the watershed?

thanks for your help

[MarkBoucher]

The longest flow path function is part of ArcHydro. It is free. May take a little while to learn it though.

[LukeSturtevant]

I've posted a reply on this thread that might be useful for anyone searching on this topic.