The suggested Cedar Cr Tr457 and Fifteenmile Tr456 Loop route is a lollipop which starts at FR4421 (the lower TH). Ascend Fifteenmile Tr456 then return on Cedar Cr Tr457 and Fifteenmile Tr456.
Unlike many creekside rides, this loop involves some steep climbing/descent.
Cedar Creek has a steeper incline than Fifteenmile, so CCW is the better route, although that means finishing the ride with a Fifteenmile Tr456 grind if starting at the upper TH (the typical route).
For those who really enjoy climbing, Fifteenmile Tr456 can be combined with the Knebal Spgs Tr474 loop.
The CW alternative results in a longer, more gradual downhill, about a mile of hike-a-bike up Cedar Creek, then a slightly easier climb back to the TH.
The alternative shown in the guide below starts from FR44, with Underhill Tr683 helping to eliminate the inverted ride profile, creating a 14mi (4100' climb) lollipop loop.
This does include an unclimbable 1mi, 16% grade from the Underhill/Fifteenmile intersection.
Note: The lower Fifteenmile Tr456 FR4421 TH
View of Fifteenmile Tr456 FR4421 THmay be overgrown due to lack of use, but provides a better starting point than the upper (FR2730) TH.
From the FR4420 intersection, continue 6.1mi to FR4421. Go right onto FR4421 and go 5.1mi to a sharp curve. Park and find trail.
For camping, check out the Fifteenmile Creek CG or the Eightmile Creek CG.
TH: From the Eightmile Crossing campground, switchback on Eightmile Cr Tr459 then cross FR4420 and go left at the fork, to remain on Eightmile Cr Tr459.
2.7mi: At the Bottle Prairie campground, cross FR44 and continue the moderate ascent on Lookout Mountain Tr450, alongside Eightmile Creek. Pass an access trail on the left at 4.5mi, then ride to the Eightmile Meadow intersection.
5.2mi: Go left onto Fifteenmile Tr456, cross FR4420 and reach the Eightmile Point ride summit at 5.5mi, then descend to Fifteenmile Creek campground.
6.9mi: Ride through the Fifteenmile Creek campground and descend Fifteenmile Tr456, passing the Cedar Creek Tr457 intersection on the right at 7.5mi. From 8.2mi, the trail parallels and crosses FR4750 several times, for 1.5mi, before breaking off to the right and descending Fifteenmile Creek.
12.6mi: Go left onto Underhill Tr683 and hike-a-bike for .9mi alongside a creek, then descend to FR44.
15mi: Go left onto FR44 and ride to FR4430 and back to the Eightmile Crossing campground TH.
Cedar Creek Trail 457, Fifteenmile Trail 456, Underhill Trail 683
Bottle Prairie Campground, Eightmile Crossing Campground, Fifteenmile Campground, Knebal Springs Campground, Pebble Ford Campground
Ranking consistently applied to all of the listed trails.