Floatuber - You don't say what the people and Flaming Geyser were fishing for, but I assume its steelhead. Here's how to tell if that part of the river is open to steelhead fishing.

Firstly, like others have suggested, get a map of the area and locate where you want to fish.

Second, go to the Special Rule section of regs and you'll see that the Green River (King Co.) is broken into four sections. Flaming Geyser park is in the last section - Auburn-Black Diamond Road Bridge to the Tacoma Headworks. The ABDR Bridge is just upstream, literally a stones throw, of the State Route 18 bridge.

Third, go to the second column in ths Special Rules to look for the species you want to fish. Since steelhead are classified as trout, this is the information line you want to read all the way to the left.

Fourth, read the third column, which lists the open season, in this case its June 1 to March 15.

Finally, the other two column list size and other special rules.