I have biked and run this trail from end to end multiple times. I love that it's easily accessible from my home and I can do any distance. Mostly mild ups and downs; it does have a couple of challenging hills, but that's part of the workout, right? In warm weather you may want to plan for early morning or evening use do to the lack of shade.
I have seen comments that this trail uses the emergency lane on the highway and is dangerous. Not actually true. There IS a designated bike lane on the highway, but I never use it. The separate paved trail runs parallel to the highway, but does switch sides a couple of times. These changes need better signage. Watch for these changes especially at the intersections of 13400 South and also 7800 South. Staying on the separate path is much safer and provides a more scenic and more enjoyable experience.
Side note - I have seen many types of birds, several deer, and a five foot bull snake.

I like this trail, I have ridden it many times in the past, this is the first time this year. Right now there is a detour to the rail trail, looks like the Parkway trail is being paved and 'touched up', nice, thank you! I rode on a week day so not much traffic. Added bonus, there was a young fox on the trail this morning! The only thing I dislike is the diesel fumes from the vehicles on the south end where you are riding right beside the Legacy Highway.

This is really one of the best trails in Utah. The only issue is that it can have heavy use at times. Even then, it’s wide and smooth with great views all around. We’ve cycled the complete trail many times in all seasons and never been disappointed.

Provo River Parkway is a mixed route that is hard to beat. From the lake (but see below) to the babbling river, to quiet residential areas, following an easy track along a main thoroughfare is hard to notice with the spectacular mountains in plain view. It's really quite good. The cherry on top is the ride up the canyon. Five miles of up can sound intimidating, but the grade is mostly low and the route is accessible to adv beginners. The views all along are fantastic, but Bridal Veil Falls and Vivian Park hollow are worth the effort.

I would have given five stars, but the route on the Utah Lake State Park end is still a mess (May 18,2021). The trail is closed at the first two trailheads starting at the lakefront access. We used N Geneva Rd, where the trail is also closed. Basically, everything west of I-15 is hit or miss. Expect unmarked detours. We were able to follow W Center St to Independence and back to the trail. Center St by I-15 looks like a major highway. There is a wide sidewalk just after the underpass that is easy to miss (and of course is not marked).

It's also a little confusing at W 2230 N St. The trail is marked closed. It appears that it will eventually continue along the river. The correct unmarked detour goes along 2230 St for about 1/2 mile. Turn left on the wide walkway at University Ave (Rt 189) and you're on your way to the canyon.

Also, the trail is often marked as three lanes, two for bikes in each direction and one for pedestrians. However, it was common to come around blind corners and encounter runners or walkers in the bike lanes. Be alert.

The wide smoothly paved trial runs north out of Oram, UT and follows the path of an early irrigation project north for about 17 miles. The snow covered Wasatch range to the east and Utah Lake to the west provide great scenery. Since the trail is built over the now encased irrigation canal the slope as quiet easy [+ or - 2%]. There are a few neighborhood roads to cross but the drivers were all very gracious

The Murdock Canal Trail is getting connected at the American Fork River, but it is closed at Canterbury Road leading down to Dry Creek.

This is a paved trail but there are gaps in the pavement about every 30 feet. I tried to ride the trail from end to end and felt beat up after 20 miles. In mid vale the trail just ends at a 4 lane highway and you have to play trigger to cross. Frustrating that such a great trail is so poorly thought out. Great for running and walking. Frustrating for longer distance cyclists.

I love riding this trail from SOJO to Saratoga, but as of April 2021 part of it was closed and had a detour towards a neighborhood path. I got my first flat tire in five years on this trail, and there was a recently-chewed off deer leg, on this section of detour.

I started my ride at the portion of the trail near Utah Lake State Park. As soon as I got out of the parking lot there was a sign saying that the trail was closed ahead. I should have paid attention to that, because after riding through a section of trees, I came to a cul-de-sac and another sign saying that the trail was closed and not open to pedestrian traffic. I headed back to my car and decided to try accessing the trail at Fort Utah Park. Just after getting out of my car there I could see that the trail was also blocked at that location due to some sort of construction project. So back into my car I went and drove to Paul Ream Wilderness Park. I was able to get on the trail here, and rode northeast on the trail past Exchange Park. When I got to N University Pkwy, the signage was confusing to me and instead of staying on the trail I ended up riding parallel to the road before deciding to turn around near the Cold Stone Creamery. Not a good day of biking for me. Perhaps the northern section of the trail is better, but I probably wouldn't return to this part of the trail again, at least not until they've finished the projects that are blocking off sections of the trail.