Hey Clifton - the trails up on the ridge are part of the world-famous "Thrilla" route, from the "Thrilla in Woodinvilla":

http://evergreenmtb.org/wiki/index.p...:Thrilla_Route

There is a regular thursday night group that rides this route, leaving from the Kiosk at the intersection of the SVT and the Puget Power Trail. Always room for one more with this group.

Another place to get your grunt in is the fire roads at Tiger Mountain. Map here:

http://evergreenmtb.org/wiki/index.p...Tiger_Mountain

Bek's route is a good one.

Take a look at this map (caution, it's big).

http://your.kingcounty.gov/ftp/gis/W...8_complete.pdf

From SRT:

Tolt Pipeline East
Drop down to West Snoqualmie Valley Road go right and then left on 124th across the river.
Pick up the Snoqualmie Valley Trail on the other side of the valley
Ride the trail till it ends at Tokul road. Climb up to the road, go right, left on Millpond and then left on Reining Road. Look for a set of stairs back up to the trail on your right.
At Rattlesnake Lake, pick up the Iron Horse Trail for as far as you want to go.
On your way back, instead of taking the Snoqualmie Valley Trail all the way back, drop down (off Millpond) at Snoq. Falls to 202, cross the river and take the Snoqualmie Ridge and Whitaker Trails over to the Preston-Snoqualmie Trail to the Issaquah-Preston Trail to the East Lake Sammamish Trail.

It's a great training ride.