We ride a gravel tandem and the surface of this trail was easy to ride on. Mostly packed dirt that road bikes can handle (we saw a few). Yes, we did see a few "critter holes" in the trail, so there needs to be some attention paid there; however, there weren't so many as to be a pain - you do need to watch the trail surface, though. Our ride started at the Alta Trailhead and we turned around at the Princeville Trailhead, near the RR crossing. In the town of Dunlap, the trail transitions to local streets, but they weren't busy (we rode on a Thursday). The signage in town could be a little more clear at the transition points.

Parked where I-74 crosses the river Headed west along the trail but the headwinds were so strong I turned around and went east but ended up in a warehouse district alone so came on back. A well maintained trail with lots of bikers and walkers enjoying it

Hi everyone-- did the trail July 31, 2021 on a Diamondback Insight Hybrid, 75 degrees and partly cloudy day.

The trail is...not bad. I wanted to give it 3 1/2 stars, so will round up here. I crossed the state --largely using I&M Canal + Hennepin along the way-- starting at Co. road 1200 E (NW of Wyanet) going all the way to Colona, near the Quad Cities. Generally, the further west you go the better in terms of trail surface. Where I started on the eastern portion it was like riding on 'crushed peat' -- grassy and narrow. The asphalt-ish surface starts around I-80 and goes northwesterly from there. There are a few spots that are 'large' gravel but I wouldn't get too worried about that.

I wish the Hennepin was more marked (mile markers, etc) like the I&M Canal. Not much you can do about the lack of services, so bring plenty of water, snacks and a fully-charged cell phone. Princeton and Geneseo are great bookend towns, so to speak, although Princeton is a bit north of the trail. Very peaceful ride, although a little monotonous after a while. The feeder basin area (where the Rock Falls spur branches off) is pleasant.

A hybrid or mountain bike is 'probably' the best way to go here...especially on a dry surface...which I had, thankfully.

Dreaming a bit here...but I think a fully-paved trail between the Quad Cities to the Indiana border, largely using the Hennpin, I&M Canal and Old Plank Road Trails would be amazing and a financial boon to towns along the way. But the cost of constructing such a thing.............

A couple buddies and I rode the Hennepin Canal trail Memorial Day weekend from approximately Wyanet to the Quads, then took the Great River Trail up to Fulton, country roads to Sterling/Rock Falls, and back down on the north branch of the Hennepin. Great two-day ride, about 130mi. We had one gravel bike, one MTB, and one roadie. Gravel was definitely best, but we all did great. About half the Hennepin is paved, the rest fine gravel or soft dirt. Maybe a couple spots with chunky gravel or potholes, but nothing too difficult. Even the sections that are supposedly in the worst disrepair (north branch between Rt 92 & I-88) are easily rideable. I’m sure it coulda been difficult on skinny tires if there had been recent rains, but the trail was totally dry and the guy on skinnies was fine. Honestly, don’t get scared by some of the reviews on this site. No, it’s not perfectly maintained pavement, but if you want to set personal speed records on your carbon roadie, go somewhere else. This path is a bit more rugged, more remote and wild, but its still Northern Illinois, it ain’t THAT hard. An experienced biker with a moderate sense of adventure can handle this on just about any bike. Just make sure you have water, some snacks and a charged cellphone. Overall, I’d say this is a great loop for anyone looking for a long but fairly easy ride. Easy trip out from the Chicago area, Quads or Central Illinois.

We rode from the Wyoming access to Alta & back, 40ish miles. Pretty much had the trail to ourselves. One needs to watch for huge burrows (ground hog? burrowing squirrels?) and those cute chipmunks dashing across the trail. Well maintained hard dirt trail with crushed gravel, some muddy areas. Since this was a Sunday, there were no coffee shops open in the little towns.

Enjoy the trail every time I get to ride it.

To clarify: The Rock Island Trail is an Illinois state park and goes from Alta to Toulon. It does not include the trail owned by the Peoria Park District known as the Keller Branch although one starts where the other stops - at Alta. The Rock Island Trail is approx 26 miles long therefore not 38. This may be a difference without a distinction for most users but for those looking to set an FKT on the Rock Island Trail the world should understand exactly what the Rock Island Trail is and is not.

wonderful trip across America

My wife and I road from Toulon to a little past Princeville and back to Toulon (30 miles) in the snow on our fat bikes. There was about three inches of snow. The tree lined trail was beautiful. Highly recommended for winter riding. We were the only set of bike tracks and saw three people in 6 hours.