very few run this in the upper 3's as a swim would be life threatening. Bad Hole at the top of the 2nd rapid. Spout goes on the far right.
The Spout is the tallest individual drop in Great Falls at about 18-22 feet with a sloping lip. the current is pushing to the right, curving down a 4' slope, and falling off to the left.
The standard 'old school' line is to start in the river right eddy and drive hard left across the lip and boof when the ramp ends. Lots of people will inevitable misjudge the current here and end up falling off sideways in the middle....The hole becomes really powerful above 3.1, and a rock behind the curtain (Big Toe) becomes exposed below 2.8.
Many people now prefer the right lines. The far right line involves driving up onto the boil at the lip and boofing onto a rock shelf jutting out from shore. It looks ugly but runs pretty smooth. Skipping off the shelf is actually softer on your back than landing in the green water on the left.
The preffered line is the right of center, boof off the curler, race line. similar to the far right line, but just clipping the edge of the boil, and taking a huge lefty off the curler that falls into the meat of the hole. Run well, this will give you some serious air time but you should either land clear of the hole or in the seam, reemerging with a mighty salmon jump
The Crack (Class 5.2) is a high-water (3.3 < LF < 3.70) alternate line to the Spout. It requires you to ferry across powerful current and hit a boat-width slot at full speed. If you miss the slot, or get rejected by the boils guarding it, you will wash over the Spout backwards and get destroyed.