View south at ski slopes at Solitude as we head west on the Wasatch Crest Trail....
View south at ski slopes at Solitude as we head west on the Wasatch Crest Trail. September 22, 2011.
Wasatch Crest - Midmountain Loop

The loop tying the Wasatch Crest and Midmountain Trail is a big ride with substantial climbing at high elevations. It's a tough trip, for very conditioned riders only. There are several ways to do it, some much harder than others. Your top altitude will be 10,000 feet. Starting elevation depends on your choice of trailheads.

The shortest possible ride will be 22.3 miles with around 3000 vertical feet of climbing during the trip. Most "epic riders" don't even consider this option, which involves intersecting the loop by taking the gondola from The Canyons to meet the Midmountain Trail at Red Pine Lodge, or driving uphill on King Road from Park City to intersect the Midmountain.

My personal recommendation: Start from Park City. Climb via CMG or Armstrong. Take either Pine Cone Ridge or CMG to Apex to Keystone to Shadow Lake for your climb. Drop down Spiro to finish.

A rider completes the last gut-busting climb of Puke Hill. Sept 22, 2011.
A rider completes the last gut-busting climb of Puke Hill. Sept 22, 2011.
Rides starting from Big Cottonwood Canyon
There are two popular starting points: The classic start at the hairpin turn in the Guardsman Pass road, with 0.6 miles of doubletrack to intersect the loop at Scott's Pass, and the viewpoint parking right at the top of Guardsman Pass, from which you reach Scott's pass by descending the Scott's Bypass trail. To start the loop from Guardsman Pass yeilds about 100 vertical feet less climbing total, but it adds 200 feet of climbing to the final big climb at the end of the ride.
A third option, a brutal climb, is to ride up Mill D North Fork to meet the trail near Desolation Lake.
You can ride the loop either way, but almost everybody does it clockwise, taking the Wasatch Crest north, then descending to the Midmountain trail, with a climb back up to Scott's Pass at the end of the ride. My descriptions and track files assume that you'll go the traditional clockwise direction. Options for climbing back to Scott's Pass include Pine Cone Ridge, Powerline/Shadow Lake, CMG/Apex/Keystone/Shadow Lake, Thaynes Road, or CMG/Apex/Dead Tree.
There's a bathroom at the Guardsman Road trailhead. Water, food, and bathrooms are found at the Red Pine Lodge on the Midmountain Trail, about 10 miles into the ride.
As we hit the top of Puke Hill, we see over the Crest into the Park City area.
As we hit the top of Puke Hill, we see over the Crest into the Park City area.
Classic
Guardsman Road start, return via Powerline: 23.7 miles, 3300 feet climbing

Climb doubletrack from the hairpin turn in the Guardsman Road. Finishes with a steep grunt up from the Spiro intersection up the Powerline Trail to Shadow Lake.

TH info:  Wasatch Crest page
Track:  Download GPX

Apex Climb
Guardsman Road start, return via CMG to Thaynes Road to Apex to Keystone to Shadow Lake: 26.2 miles, 3400 vertical feet climbing

The climb up CMG-Apex-Keystone is 2.5 miles longer, but it's at a much more gentle grade, with frequent views and varied terrain. This is my preferred climbing route and is our "featured loop". See below for the mile-by-mile.

TH info: see sample ride bottom of page 
Track:  Download GPX
Alternate, from Guardsman Pass:  GPX

Heading northwest on the Wasatch Crest, with the ridge between Big Cottonwood an...
Heading northwest on the Wasatch Crest, with the ridge between Big Cottonwood and Mill Creek on the left.
Cruising west on the open areas of the Crest, we look south to the peaks that se...
Cruising west on the open areas of the Crest, we look south to the peaks that separate Big Cottonwood from Little Cottonwood Canyon. September 22, 2011.
Dead Tree
Guardsman Pass start, return via CMG to Apex to Dead Tree to Scotts Bypass (pure loop):  26.5 miles, 3400 feet climbing
If starting from DT below pass: 27.8 miles, 3900 feet climbing

Bigger loop, more climbing. Coming at the end of the ride, the Dead Tree climb will be torture. For hero climbers only.

TH info:  Wasatch Crest pageWasatch Crest page
Apex climb:  Scott's Loop page
Track:  Download GPX

Thaynes Road
Guardsman Road start, return via Thaynes Road to Keystone to Shadow Lake: 29.7 miles, 3300 feet of climbing

This is a fairly straight-forward route, not one of my favorites because of the gravel-road climb. A bit longer, because you stay on Midmountain for three additional miles.

Track:  Download GPX

As the trail turns toward Mill Creek, were looking down Big Cottonwood Canyon to...
As the trail turns toward Mill Creek, we're looking down Big Cottonwood Canyon toward the Salt Lake Valley. The tailings of the copper mine can be seen on the Oquirrh Mountains.
Heading up Pinecone Ridge, almost to the Crest.
Heading up Pinecone Ridge, almost to the Crest.
Pine Cone Ridge
With Guardsman Road start: 27 miles

Pine Cone Ridge can replace the many longer, more confusing, or steeper routes from Midmountain back to Scott's Pass.

TH info (and ride description):  Pine Cone Ridge page 
       Mill Creek to Pine Cone Ridge

Mill D North Fork
Reynolds Flat Mill D to loop w return climb via Powerline: 30.3 miles, 4300 vertical feet of climbing.

This route will give you a 4-mile climb via Mill D to reach the loop just above Desolation Lake. The climb is 1350 vertical feet from a starting altitude of 7300. There are some pretty steep sections, but not hike-a-bike for strong climbers.

TH info:  Mill D page
Track:  Download GPX

From the trail above The Spine, were looking at Desolation Lake. Photo by Rodney...
From the trail above "The Spine," we're looking at Desolation Lake. Photo by Rodney Strader on October 2, 2010.
Ride from Mill Creek Canyon
This is a more-brutal option, involving significant climbing. Connect to the loop by riding up the Mill Creek Trail to reach the Wasatch Crest at the Connector Trail to the Midmountain. Mill Creek is a fee area. You can only ride your bike on the upper Mill Creek trails on even-numbered days. 
At the top of Mill Creek Canyon, weve entered the Crest Connector to descend to ...
At the top of Mill Creek Canyon, we've entered the Crest Connector to descend to Midmountain. Sept 22, 2011.
Upper Mill Creek
Dog Lake TH to Crest Connector, climb by Powerline: 30.9 miles, 4400 feet climbing. Via CMG-Apex-Keystone: 33.4 miles, Via Pine Cone Ridge: 30.5 miles

The Mill Creek trail is 4.3 miles with 1400 vertical feet of climbing, starting from the parking area at 7600 feet elevation. This is a really big ride, with a minimum total 4300 feet climbing.

TH info:   Epic Loop page    Mill Creek page
Track:  Powerline  

Ambush
Via Powerline: 29.7 miles, 3800 feet climbing
Via Apex: 32.2 miles

Climb from the base of The Canyons. This is the best option for riders who are staying at the resort. Ambush is a fairly straight-forward climb up to an intersection with Rob's, then on to Midmountain 1.5 miles from the Crest Connector.

Track:  Download GPX

The Midmountain enters deep conifer and aspen forest. September 29, 2010.
The Midmountain enters deep conifer and aspen forest. September 29, 2010.
The Midmountain between the Connector and Armstrong has a lot of up-and-down rid...
The Midmountain between the Connector and Armstrong has a lot of up-and-down riding and some tough rocky spots. Sept. 29, 2010.
Armstrong
Via Powerline: 31.8 miles, 3800 feet climbing
Via Apex: 34.3 miles
Via Pine Cone Ridge 31 miles, see below

Good option from Park City Mountain Resort. Less steep than Spiro, but adds a few extra miles, because you can't descend Armstrong (it's a one-way trail).

TH info:  Armstrong Trail page
Track:  Download GPX

Spiro
Via Powerline: 28.7 miles, 3800 feet climbing
Via Apex 31.2 miles

The "Classic" access from Park City. Start at Park City Mountain Resort (PCMR).

TH info:  Spiro Trail page
Track:  Download GPX

Looking over Park City from the Midmountain, a bit past Spiro as we head toward ...
Looking over Park City from the Midmountain, a bit past Spiro as we head toward CMG. Photo August 30, 2011.
Were approaching Park Citys (PCMR) ski slopes on Midmountain, with Deer Valleys ...
We're approaching Park City's (PCMR) ski slopes on Midmountain, with Deer Valley's slopes at upper right. Photo Aug. 30, 2011.
Crescent Mine Grade
Via Apex: 30.6 miles, 3700 feet climbing

A less-steep climbing route, but a little harder to find. Starts as doubletrack near the southern-most lifts at PCMR. Crosses Midmountain and connects directly to Apex on the initial climb.

Track:  Download GPX

Silver Lake Lodge at Deer Valley
Via CMG to Apex: 38.0 miles, 3100 feet climbing
Via Powerline: 37.5 miles, 3200 feet climbing
Via Thaynes Road: 36.9, 3100 feet climbing
Up Team Big Bear to Guardsman Rd: 34.9, 2500 feet

This route is a longer distance, but removes over 1000 vertical feet of climbing. It starts right at the southern end of the Midmountain Trail, but you'll need a few miles to reach a climbing route to Scott's Pass. (This is the smoothest and easiest section of Midmountain.)

Via Team Big Bear Trail Page
Track via Team Big Bear:  Download GPX

Were heading up Apex, as it snakes back and forth across ski slopes and into asp...
We're heading up Apex, as it snakes back and forth across ski slopes and into aspen forest. Photo September 7, 2011.
On the Shadow Lake singletrack, were winding up around the lake toward Scotts Pa...
On the Shadow Lake singletrack, we're winding up around the lake toward Scott's Pass. September 7, 2011.
Other climbing options: 
King Road. Boring. Intersects Midmountain, or you can continue up Thaynes for a boring DT climb.
Daly Canyon-Empire Link to Midmountain. Significantly harder to navigate. Adds additional climb after descending to Daly Grind.
Sweeney to Drift Road: Blows up your legs early as you fight over the rocky tech areas in mid-Sweeney. But it's a fairly direct and short route uphill.
Sample ride, from Guardsman Road, clockwise loop:
0.0   Onto DT north N40 36.822 W111 34.271
0.7   Scott's Pass, L uphill N40 36.992 W111 33.511
1.0   Top of Puke Hill
5.0   Desolation Lake, The Spine
5.1   Keep R uphill (L = Mill D No)
        N40 39.560 W111 35.845
7.6   R to Crest Connector N40 41.204 W111 36.072
        (L = Mill Creek)
7.9   Straight
8.8   Join Midmountain, keep straight (R)
        N40 41.488 W111 35.134
11.4 Red Pine Lodge, keep straight through
        N40 40.658 W111 34.675
14.6 Keep L on MidMtn (R = Ironman) N40 39.625 W111 33.364
16.4 Hard L (R connects to Ironman) N40 40.060 W111 32.490
17.9 Keep L (R = Ironman) N40 39.299 W111 32.306
18.4 R uphill (L = Armstrong) N40 39.099 W111 32.288
20.3 L downhill (R = Powerline) N40 37.963 W111 32.180
        Then rapid R on Midmountain
21.1 R uphill on Crescent M.G. N40 38.182 W111 31.514
22.1 L uphill on Thaynes Rd N40 37.822 W111 32.017
22.5 R uphill on Apex ST N40 38.018 W111 31.760
23.1 R on Keystone N40 37.780 W111 31.869
24.1 R on DT N40 37.100 W111 32.641
        Then cross to Shadow Lake trail
24.2 Keep straight across to ST N40 37.075 W111 32.736
25.0 Hard L on Blazing Saddle N40 37.004 W111 33.278
        Alternate: continue to DT then L uphill
25.5 Across Scott's Pass and down
26.2 At car
Wasatch Crest to Midmountain Loop
Wasatch Crest to Midmountain Loop
Sample Ride:

From Guardsman Road to Crest, return via CMG, Apex, Keystone, and Shadow Lake (26.2 miles)

Getting there:
Head up Big Cottonwood Canyon at the junction of Wasatch Blvd and 72nd south. Drive up past Solitude Resort (about 15 miles). Just before you reach Brighton, the road to Guardsman Pass turns off on your left. At 0.8 miles, you'll see a red metal gate. Exactly one mile later (1.8 miles from the fork in the road), you'll see a dirt road on the left as you go around a hairpin to the right. GPS N 40° 36.817' W 111° 33.532'. Park along the hairpin turn and bike up the road. (There's a second -- closed -- gate about 100 yards up the road. Just pack your bike around the gate and continue.)

Riding Resources:
Higher-res topo map:  View map
Single-page riding guide for printing
GPS track for this ride:  GPX
Lodging, camping, shops: Links to Cottonwood canyon resources