Snagging is legal in all areas of the Yellowstone River in North Dakota, and in the area of the Missouri River lying west of the U.S. Highway 85 bridge to the Montana border, excluding that portion from the pipeline crossing (river mile 1,577) downstream to the upper end of the Lewis and Clark Wildlife Management Area (river mile 1,565).
Snaggers should be aware that mandatory harvest of all snagged paddlefish is required on Tuesdays, Wednesdays, Fridays and Saturdays. On these days, all paddlefish caught must be tagged immediately.
Legal snagging hours are from 8 a.m. to 9 p.m. daily. Snaggers are allowed only one tag per season.
Snag-and-release of all paddlefish is required on Sundays, Mondays and Thursdays.
Those planning to participate during snag-and-release-only days need to have in their possession a current season, unused paddlefish snagging tag. Use or possession of gaffs is prohibited on snag-and-release-only days, and, if it occurs, during the snag-and-release extension period.
All paddlefish snagged and tagged must be removed from the river by 9 p.m. of each snagging day. The use or possession of a gaff hook within one-half mile in either direction of the Highway 200 bridge on the Yellowstone River is illegal at any time during the snagging season.
If the season closes early because the harvest cap is reached, an extended snag-and-release-only period will be allowed for up to four days.Much, much more at the link.
For newbies: paddlefishing is NOT the same as paddleboat fishing.