Just south of Kanab, there's a paved trail that circles completely around Jackson Flat Reservoir. The trail is popular with road bikers, biking families, hikers, and dog-walkers.
(2) Reservoir Road parking. A gravel road forms a semi-circle on the east and northern sides of the lake. The entrance is 0.9 miles from US-89 if you keep straight at the road fork to the park. On the gravel road there are occasional parking strips with port-a-potties. You can step across to the trail.
(3) Paved access trail. There's a 1.2 mile paved trail from 1000 East in Kanab that joins the northern end of the loop around the lake. There's some primitive gravel parking at the northern end of the paved trail.
The other trail fork is the junction with the paved connector trail at the northeastern corner of the loop. The connector goes 1.2 miles north to end on city streets. Getting to the top of the connector from Kanab's streets isn't straightforward. Use your map app to look for 1000 East 1100 South to find your way there.
Very pretty ride. Lots of fun for families with biking kids. Excellent facilities (including regular doggie-bag dispensers), and the area seems well cared-for. It's worth doing if you're staying in Kanab with a bike.
Alternate parking: As you turn onto the reservoir road from 89A, continue up Kaneplex Drive to mile 0.9 and turn left at the Reservoir Road sign. This gravel road circles around to the north side of the reservoir, with several spots offering parking with port-a-potties and a hike-a-bike route to the paved trail.
City connector paved trail: Route #1. On US-89 eastbound,
0.5 miles east of where 89A splits off, turn right onto Chinle Drive (old
US 89). Turn right again on 1000 East and find the trailhead on the left
side of the road after around 1/10th mile.
Route #2. Get onto US-89A southbound. Drive 0.7 miles and turn left onto
1100 South. Drive 0.8 miles and turn left on 1000 East. After around
1/10th mile, turn right into a gravel parking area.
Kanab area multi-track GPX file