From Evergreen Trail Guide
Deep Creek is a very difficult trail. Steep and rugged this a great descending trail that will provide challenge for any gravity enthusiast. It is also a fun and different way to climb up to Noble Knob. Sure as heck beats riding up a road. Although there is some hike a biking near the top most of the trail is very ridable if you are an expert climber.
How to find it
Go East on Hwy 410 from Enumclaw about 30 miles, turn south onto Rd 7160, Buck Creek Rd. Go across the bridge and immediately turn left into a parking lot. This is upper Skookum Flats Trailhead.
To access the lower trailhead ride back out to Highway 410 on Buck Creek Rd. Cross the highway heading West, immediately find a benched straight trail climbing directly to White River Trail. Take a right and head up White River and across for 1.5 miles to lower trailhead. Riders who attempt ascending Deep Creek are a rare breed so it's likely you'll continue on up White River Trail to FR 7174 to Noble Nob.
Access to the top can be done from riding White River Trail to Ranger Creek to Dalles Ridge Trail to Noble Nob Trail, but the most common route is White River Trail to Rd. 7174 to Noble Nob Trail.
It's common for riders of Deep Creek Trail to park at Camp Sheppard as well.(east side of 410). Or at the Upper White River Trailhead on FR 7174. Shuttlers will park at Corral Pass at the Noble Nob Trailhead near the end of 7174. Forest Parking Passes are required for all parking areas required.
The junction of Deep Creek and Noble Nob is at 5900 ft so check snow levels before you head out.
From MTBR WA:
slightly dusty in spots but fairly grippy for the most part. [...] The only issue we had was that there were 4 or 5 fallen trees blocking the trail so we had to stop and hike over them. Nothing too big, but bigger than my 9" folding saw can handle.
R1de 21:22, 31 July 2012 (PDT)
Deep Creek is nearly always accessed from Noble Nob Trail and descended. The trail is extremely steep and rugged with lots of roots, and small drops. Caution should be afforded for even though it's not a very popular trail, the terrain is so steep it may be difficult at speed for less experienced riders to stop, so be extra alert and slow and stop for occasional hikers.
There is a nice spot for a quick view and a break about 2/3rds of the way down. It is encouraged since it's a 4 mile run that you take at least one break to cool your brake rotors down to minimize fade, and/or possibly do damage to your brakes.
Although there are short sections of Palisaides and Ranger Creek Trails that require more skill to clear, Deep Creek as a whole is the most technical trail of the 3 trails coming off of Noble Nob/Dalles Ridge.
Local Points of Interest
The town of Greenwater has food, maps, forest service parking passes, and gas. Wapito Woolies sells maps and also has ice cream, yum.
Deep Creek info FS trail #1196.
Greentrails Map #238-Greenwater and #239-Lester
This is for information about the trail's history with respect to mountain biking, the land owner, etc.