This is a killa' DH trail that drops you 3,500' in 3 miles. A minor concern is that you have to get to the top with your bike somehow. While not as fun as the Dutch Flat Trail a couple canyons over, this is more challenging technically with less pedaling so "fun" is just a matter of opinion. Freeriders probably would enjoy this trail more than Dutch especially if they can get a mule to pack their bike up to the lake.
The reason it isn't featured as an uphill trail here is that it is only about half rideable. You are on and off your bike the whole way up. On a positive note, the reason you are getting off your bike is because every few yards there is another step of rocks that is what creates the numerous Plinko episodes as you come down. So, every step up with your bike is an investment in your future return.
The trail has great character and a wide berth, traveling through big stands of tress with a few visits to the crystal clear creek. The signature decomposed granite and white rocks of the Elkhorn mountains is present throughout. The trail is also well maintained and cleared of brush and blowdown, but does have some erosion problems. All but the last few hundred yards are singletrack. The lake itself is a less-than-impressive alpine lake because the dam has harmed the ascetic of the shoreline.
The trailhead has no marking. You get there by traveling up Rock Creek Lane west of Haines. It is a good gravel road until you see the sign for 2 miles to Killamacue. Unless you have a high clearance vehicle you should park at a pull-out in the road around this sign. If you want 4WD action, continue up the 2 miles until the road opens up at a turnaround junction where it meets Killamacue Creek. The trailhead is pretty visible on the right and marked by a cairn. Driving here saves you about 1000' of climbing, but definitely slows your return time.
