AI synthesis with sources · 3 min · edition 2027
The Florianópolis 70.3 Bike Course: 90 Rolling Kilometers to Ride by Watts, Not by Feel
A single loop on the SC-403 and SC-401 highways with 546 m of climbing: here's how to break it into segments and where you actually gain time.
The Course at a Glance
90.1 km on a single loop in the north of Santa Catarina island, along the SC-403 and SC-401 highways. Official elevation gain is 546 m. This is not a climber's course: it's a fast rolling route, with highway-grade tarmac and long stretches where your aero position matters more than peak watts.
How to Read Those 546 Meters
The profile published by PJAMM breaks the loop down like this: about 7 km of false flat uphill at 1-3%, about 6 km with grades over 3%, about 13 km downhill, and the rest essentially flat. Translation: you'll be pedaling hard and in aero for more than half the course. The real climbs exist, but they're short and won't decide your race. The false flats will: whoever rides them at steady intensity without surging gets to the run with good legs.
Pacing by Goal Bracket
The course guide's rough estimates (not official data) put bike splits between 3:20 for a relaxed finisher and 2:22 for a top age-grouper, with 2:55 and 2:35 for the intermediate targets. There's one rule: steady watts. On the opening 1-3% false flat, the temptation is to push because it "feels flat." Don't. Hold your target and bank free speed on the 13 km of descent and the flat sections.
What to do in training: simulate long blocks (20-30 minutes) at race intensity in your aero position on false flats or into a light headwind. That's the specific demand of this course.
The Rules That Apply to You
- 12-meter draft zone for age-groupers. Penalties are served in the penalty tents, whose locations are published in the athlete guide about a month out.
- Trash only in the drop zones at aid stations. Tossing a gel outside a zone costs you an avoidable penalty.
- Intermediate cut-off at km 80.6 at 11:08 a.m., and swim+T1+bike must be completed within 5 hours of your swim start.
Doing the Cut-Off Math, If You're Not Fast
If your swim is close to the 1:10 limit, your bike margin shrinks. Do the math before race day: swim start time, plus your realistic swim time, plus a quick T1, plus the bike. You must pass km 80.6 by 11:08 and complete all three legs within 5 hours. If your margin is under 20-30 minutes, your race plan is simple: a no-frills T1, no long stops at aid stations, conservative but continuous pacing.
Equipment and Gearing
With max grades over 3% but no documented walls, a standard TT chainring with a mid-to-wide cassette covers everything. Detailed wind data isn't available in the indexed sources: bring a front wheel you know you can handle and decide on site. Set up your hydration on the frame: 90 km in mild conditions (highs of 23-25°C) isn't extreme, but the run afterward will thank anyone who drank consistently.
The Decision to Make Now
Pick your number today: the watts (or effort zone) you'll ride the false flats at. Test it in a long workout with a run off the bike. If after 90 minutes at that effort you run the first 5 km well, the number is right. If not, lower it. On a course like this, you win the bike by not losing the run.