There is quite a gap between the south and north part of this trail,
https://dnr.wisconsin.gov/topic/parks/wiouwash .
We parked at trailhead near Hexco motorsports and Tribal Heritage Crossing Trail,
https://www.co.winnebago.wi.us/parks/recreational-trails/tribal-heritage-crossing-wiouwash-state-recreational-trail , that runs next to Hwy 45 over Lake Butte des Morts.
First we headed north to Hortonville. Wind was mostly out of the west. However on the way back it felt like it was behind us and we made better time. We were prepared with 4 repaired tubes. However we didn't have any flats probably due to the new back tire. (All the knobs had worn off our old tire.)
The trail had moderate traffic with quite a few families with kids. Also kids walking with fishing pools. It looked like there would be pretty good fishing along the trail in Oshkosh. There was less people between the Friendship trail and Hortonville, probably because of the mud.
It was mostly farm fields and prairie with occasional forest of deciduous trees. 1 maple and some sumacs were turning red. This would be a hard trail to ride on a super windy day.
There were warning signs about sediment basin and mud pond between friendship trail crossing and Hortonville. Apparently sediment basins can act like quicksand to young children who do not have the strength to exit. Also dangerous stuff like glass, rusty metal, and dangerous animals could be in the pond along with bacteria and amoebas that can make people sick.
https://knoxvilletn.gov/UserFiles/Servers/Server_109478/File/Engineering/BMPManual/ES-19.pdf
https://en.wikipedia.org/wiki/Sediment_basin
https://www.michigan.gov/documents/deq/wrd-nps-sediment-basin_642076_7.pdf
https://www.clemson.edu/extension/water/stormwater-ponds/problem-solving/muddy-turbid-water/index.html
http://publications.tamu.edu/WATER/SCS-2013-02.pdf
Overall the trail surface is level and made up of mostly crushed limestone with grass growing in the middle. It ranges from very wide to quite narrow in places. You share the trail with horses (although we didn't see any) so watch out for their piles. Trail surface rating: 1 to 3 out of 5. Some areas were quite good. There was only a little loose gravel in places and not too many holes but still some bumps. There was some mud but it was pretty firm. Didn't sink in too much. Probably not the best trail to ride after rains. Especially north of the Friendship Trail crossing. The trail had a sign that said 7n and 7s corridor at this point.
There are quite a few muddy areas after you cross the western portion of the Friendship trail,
https://dnr.wisconsin.gov/topic/parks/friendship . It looks like you would have to ride along Hwy 10 to get to the eastern portion of the Friendship trail in Brillion in order to connect up to the Fox River Trail,
https://dnr.wisconsin.gov/topic/parks/foxriver , that runs along Hwy 57 and goes to Green Bay.
There is only one bathroom in the middle portion of this part of the trail. However it is a very nice one located in Trailhead Park, Clayton,
https://www.townofclayton.net/index.asp?
There is lots of parking there, playground, picnic pavilion, vending machine, snowmobile club sheds, Fire Station #43, and a tavern down the road.
Entry off trail to Trailhead Park, Clayton, WI
Hortonville Trailhead signs
Here's a sign from a trailhead across the street from a large tavern near the southern part of the trail in Oshkosh.
Once we got back to the recreational trail parking next to Hexco Motorsports we decided to head south on the Wiowash Trail. It basically runs about 3 miles more or less along the Fox River to Steiger Park. It starts out as crushed limestone but then became a mix of low traffic streets, asphalt, and concrete. Surface rating 4 to 5 out of 5.
We went past some really neat stuccoed row houses.
It was very entertaining watching boats race up the Fox River. I didn't know that a canopied pontoon boat could go that fast. You could probably ski behind it.
After that the trail basically followed along side the Fox River. We went past a hospital and Oshkosh University until we arrived at Steiger Park where the trail really ended.