The 70.3 Utah Bike Leg: 90 km with the Provo Canyon Descent

What We Know (and What We Don't)

Let's start with the facts. The bike leg measures 90 km and crosses Wasatch and Utah counties, finishing at T2 in Orem. The official description calls it a 'net downhill' course through Provo Canyon on US-189, with smooth roads and scenic views. But that same landing page also labels it 'hilly.' That's no small contradiction: it means rolling terrain, not one continuous descent.

What's missing is the elevation gain. The official elevation profile hasn't been published: any number you see floating around is an estimate, not data. What we know for sure is the geography: T1 is at Deer Creek Reservoir, up at altitude in the Heber Valley; T2 is in Orem, down in the valley. The bias is downhill.

The Canyon Descent

Provo Canyon is the key section. A long descent on a highway (US-189) at high speed demands two things: technical confidence and power discipline. Downhill speed is only free if you stay in your aero position and don't spin out pedaling into nothing. Plenty of athletes on race-prep forums are discussing exactly how to handle this section: the temptation to push where you're already going fast is the classic mistake.

The logic is simple: 20 extra watts at 50 km/h buys you a few seconds; those same 20 watts saved are worth minutes on a half marathon at 36 °C. The heat comes after the bike, not during it.

What to do in practice:

• Practice long descents in training. If you live somewhere flat, get in at least a couple of rides with sustained descents to dial in your position and lines.
• Set a power cap for the descent. Above a certain speed (say, once you're over 45-50 km/h), stop pushing and tuck into your position.
• Surge smart. A 'hilly' course with a downhill bias means there are sections where you climb back up or slow down: that's where steady watts matter, not spikes.

Altitude and the Start

T1 sits at altitude in the Heber Valley. Heart rate and breathing will run higher than usual for the same effort, especially in the first kilometers when you come out of the water with your heart rate already spiked. Start conservative: the first 15-20 minutes are for finding your rhythm, not making a difference.

Pacing by Goal

Rough estimates (not official data — it's the first edition) put the bike split between 2:25 for a top age-grouper and 3:25 for a relaxed finisher. With the downhill-biased profile, times could come out fast compared to a flat 90 km — but until the official elevation profile is released, that's a cautious call.

The operating rule: pick a sustainable normalized power target just like any hot 70.3 (many athletes use 78-82% of FTP as a reference, adjusted for your own experience) and take something off, don't add, to account for the heat waiting on the run.

Hydrate on the Bike

August lows are around 22 °C: it's hot even in the morning. The bike is when drinking and taking in sodium is easy; on the run it becomes damage control. Don't wait until you're thirsty.

Your Call

Before the race, do three things: 1) drive the course in the days beforehand, especially the canyon; 2) set your watt cap for the descent and write it into your race plan; 3) check the official elevation profile as soon as it drops in the athlete guide and recalibrate your expectations. If the profile turns out to have more climbing than expected, better to know beforehand than at km 40.