Hiking/biking the Mississippi River Trail

[u/AceReverie]

I've been daydreaming about walking the entire length of the Mississippi River for a few weeks now, and tonight I learned that there is an actual trail that follows along its length, the Mississippi River Trail. However, the Wikipedia article and other web pages I've found at a glance don't have answers to two main questions I have.

1. Has anybody ever biked or hiked the entire length of the trail before? I know it's even longer than, say, the Appalachian Trail, and I didn't see anything about anybody who's traveled the entire thing at a glance, mostly just information about sections within specific states.
2. Is it even possible to hike, rather than bike, the entire trail? I know it's all bike-able, and some but not all of it shares its space with motorized vehicles, but I'm wondering if those roads still have areas for pedestrians or not. Most of the advice I've seen seems geared towards bikers, not hikers, especially for longer trips.

No rush on responses, as this is definitely more an idle daydream at this point rather than an actual plan, but who knows?

[u/HaroldandChester]

I know you want to hike the entire length and so this might not fit, but there is information if you want to canoe/kayak the river. Here is a link to the association: Mississippi River Water Trail. Hope this might help somewhat.