Copy-pasta from a post I made over on another forum:
Start + first half of first climb: you’ll roll on the pavement down and then up into the resort. Pace here will naturally be fast due to all of the other riders adrenaline. Once you roll through the resort you’ll start to head upward on doubletrack that will increase in gradient as you get to the mid mountain station. Depending on your position, there will be a section that many riders won’t have the gearing to get up which will cause a cascade of dabs. If you see someone dab in the last section, just hop off the bike and start hiking. You’ll probably be faster than those around you and save a bit of energy.
Second half of first climb: after you get onto the pavement at mid-mountain, you’ll transfer over onto the second set of the climb which is more fireroad that will wind up towards the top. Steady pace here is good, don’t bother trying to go too hard since it’s early in the race.
First descent and rolling terrain: You’ll start with a singletrack descent (Knick Knack?) that is pretty fun but short, followed by a short climb and then a wide fireroad descent that is mostly straight all of the way down. It will be dusty so you may want to give the rider in front a bit of room. Not much to worry about here but stay on your toes since there tend to be flats in this section with the rocks and high speed. After the descent, you’ll be in a rolling section of climbs that will make its way through a few different areas including a section that has what looks like “giant strange cabbage”. This is a good time to stay on the gas coming out of the descent and get your legs warmed up. Try and avoid getting stuck behind a slow rider at the end of the fireroad, and if you happen to find someone who is a big diesel guy, you’ll benefit a bit from the draft since this is a higher speed section.
Second climb: the road will narrow as you go through the cabbage and turn into singletrack that narrows even more and starts to turn upward. This climb will get increasingly steep as you get towards the top and most people will be in the granny through a pretty chunky section of climb. If you get thrown off your rhythm here, it’s tough to get going, so keep the gas on but avoid too many hard efforts.
Top of the climb: you’ll get dumped out onto the road and there will be an aid station to get water/food. I usually refuel at this one on lap one and lap two.
Paved road descent that will swing around and shoot you back up again
Third climb: wide fireroad. Not much to say here. Nothing to worry about and plenty of places to pass.
Singletrack descent: you’ll swing around to the (left?) and there will be a section of faster sweeping switchbacks which will eventually dump you out onto a fireroad. It can be a bit steep at times and will narrow and expand a few times with a few washed out sections that you might need to unclip a foot just to have a bit of insurance. Be wary of riders stopped on the singletrack here with mechanicals.
Deer creek climb: Probably the worse climb on the course. Steep, loose, lots of people walking, exposed. Meter your efforts here but try and get out of this section as quickly as you can. You’ll have several false summits before you well and truly start to descend down a very long fireroad descent.
Long fireroad descent: if you have a draft here, use it. Watch out when you get to a thing that looks like a bridge, because there are always loose rocks that have a tendency to toss people or cause a flat.
Long last climb: You are almost done with the lap, but this climb sucks. The first half is more shaded, but steeper. There is an aid station before you get onto the second half, which I usually stop here on the second lap. The second half of the climb isn’t as bad, but you are in the sun and exposed.
Descent: fun singletrack descent through the bike park. Have fun!
You’ll end up on the road, loop back towards the resort along the side and then head back towards the first double track climb, where you can access the drop bags.
My fueling strategy:
3 bottles, 2 on bike 1 in jersey for the first lap, stopping at the aid station on the pavement. Second lap, i’ll stop on the pavement and on the mid-way aid station.
Roughly a 3500-4000kj/calorie effort for a 70-75kg rider.
Strava segment of the lap: Tahoe Trail 2018 lap | Strava Ride Segment in Truckee, California
I’d pace for about 6RPE on the climbs and 4-5RPE on the rolling.