The event was part of a National Day of Action meant to protest abortion restrictions.
The stabbing happened at a building on the south side of Loring Park.
The city typically requires events like Pride to be staffed with off-duty police officers.
The group blocked Andrea Jenkins' vehicle for more than 90 minutes.
The man went under water Sunday evening and didn't resurface.
The man, who was apparently nude, had been seen struggling in the water before going under.
The individual was reported to be struggling in the water on Sunday night.
The latest route won't include Hennepin Ave.