To get started on Thrillium first head to the bottom of the trail where riders will find a small pull-out parking area (just west of the main lower trailhead). To get to the top there are two common approaches, either pedal up Road L1070
and the Cold Creek Connector Road
or the arguably more popular shuttle.
Whichever option you take you'll end up at a nice new parking area with restroom at the top of the trail. Enter the trees past the outhouse till you reach the "difficult terrain" sign and the Thrillium placard suspended to the left. Get ready for the fast and exciting ride ahead.
Thrillium gives you a small warm up before settling in for high-speed berms accented with drops, kickers, doubles, and tables. Most everything is rollable in this section but if in doubt, scope it out. And although the berms are large, a scattering of stones across their surface can make for a loose ride. Especially the baby-head rocks before the first road crossing.
The next section opens with an optional drop off the road headed into a series of doubles. Pretty soon, the trail flattens out as you enter a rich forest. You'll need to keep your speed up if you want to keep clearing tabletops. Next up, a couple of optional hips and gaps keep things lively until the next road crossing.
Thrillium really takes off through this clear cut section by serving up tons of table tops and the occasional double. The section has the biggest hits (20-30' in length) early on and then they get more manageable towards the end. The trail itself is pretty wide, but the advanced nature of the jumps and the logs and stumps strewn about really make you want to land cleanly.
The next road crossing leads into two massive steep turns flying into high-speed step downs. Not to be undermined at the end, Thrillium keeps packing in more impressive tables and jumps right up to the finish.
Thrillium can be ridden on a trail bike, but a downhill bike will feel great with the exception of a flat section in the middle.