What is the water temperature at Bilbao Triathlon 70.3 and can I wear a wetsuit?

The swim takes place in river water with an average temperature of 15°C during race month. Wetsuits are conditional — typically depends on race-day water temperature.

How hilly is the Bilbao Triathlon 70.3 bike course?

The 90km bike course has 708m of elevation gain and is classified as hilly. The course is loop on road surface. Drafting is not allowed.

What is the weather like on race day at Bilbao Triathlon 70.3?

Expect temperatures between undefined°C and undefined°C (average 20°C) with 41% humidity. There is a 20% chance of rain and average wind speeds of 19 km/h. Typical conditions in Bilbao

How big is the Bilbao Triathlon 70.3 and when was it first held?

The Bilbao Triathlon 70.3 was established in 2010 (16 years ago) and has approximately 2,001 finishers per edition.

What is the average finish time for Bilbao Triathlon 70.3?

The average finish time is approximately 5 hours and 30 minutes. This can vary based on weather conditions, course difficulty, and athlete experience level.

What are the swim conditions like at Bilbao Triathlon 70.3?

The 1900m swim is in river water with calm conditions. The format is open-water. River swim in Bilbao

Bilbao Triathlon 70.3 — Guide, Training Plan & Tips

Average Finish Time 05:30:00

Total Finishers 2,001

Temperature 20°C

Water Temperature 15°C

Bike Elevation ↑708m

Established 2010

"City-centre triathlon in Bilbao — race through iconic streets and waterways."

🏊 Swim

Distance 1900m

Water river (open-water)

Water Temp 15°C

Wetsuit conditional

River swim in Bilbao

🚴 Bike

Distance 90km

Elevation ↑708m

Profile hilly

Drafting Non-drafting

Hilly bike course around Bilbao

🏃 Run

Distance 21.1km

Elevation ↑106m

Surface road

Topology out-and-back

Run through Bilbao

Transition Details

T1 — Swim → Bike

T2 — Bike → Run

T1/T2 are in the same location · Surface: pavement

Weather

Air Temp 20°C

Humidity 41%

Rain Chance 20%

Wind 19 km/h

Typical conditions in Bilbao

Registration

Registration Opens Invalid Date

Entry Cost €322

Time Limit 8.5h

https://www.example.com/bilbao-triathlon-70-3

The Story

There's a reason 70.3 is the fastest-growing distance in triathlon, and races like Bilbao's are the proof. This isn't a scaled-down Ironman. It's a purpose-built race. The 1.9km swim sends you into cold river at 15°C — bracing — the kind of cold that sharpens focus. It's long enough that a poor start costs real time, short enough that strong swimmers can build a genuine lead. The 90km bike is the defining leg: 708m of elevation gain across a seriously hilly course that separates those who trained for this specific distance from those who just showed up fit. Ninety kilometres of climbing changes the race equation entirely. A rolling half-marathon through Bilbao with 106m of gain. After 90km on the bike, even gentle rises feel significant. Quick cadence on the ups, controlled effort on the downs, and trust the training through the middle kilometres. A half-iron course that doesn't apologise for its difficulty — and neither should you for choosing it.

"708 metres of climbing over 90km. That's not a bike course — that's a mountain stage. And you still have a half-marathon after."

Cyclist-turned-triathlete — Post-bike, Bilbao Triathlon 70.3

What It Feels Like

A 70.3 that reflects Bilbao: Basque intensity on a Guggenheim-framed course. It suits experienced 70.3 athletes who want a course that fights back. This isn't a PB course — it's a character-building one. Race it once and you'll understand why 70.3 is the distance athletes come back to, year after year.

🏊 The Swim

A 1.9km river swim at 15°C. Current adds a variable that changes the race — sometimes helping, sometimes fighting you. Over 1.9km, reading the current correctly can save minutes. Bracing — the kind of cold that sharpens focus. Check the race briefing for swim direction and expected flow conditions.

🚴 The Bike

90km with 708m of climbing — a seriously hilly bike course that makes the 90km the race's decisive leg. Power-to-weight matters more than pure wattage. The climbs test your legs; the descents test your nerve. Come with a compact crankset, climbing legs, and the discipline to save something for 21.1km of running.

🏃 The Run

A 21.1km rolling run through Bilbao with 106m of gain. The undulations feel disproportionate on legs that have just covered 90km of bike. Keep cadence quick on the ups, use the downs to stretch your stride, and run the tangents. In mild 20°C conditions, each hill amplifies the heat cost. Walk an aid station if you need to — it costs 15 seconds and gains you proper hydration.

💡 Insider Tips

→ Water temperature averages 15°C — that's cold for a 1.9km swim. Train in cold open water regularly in the weeks before. Your first 400m set the tone: if you can settle into rhythm through the cold shock, you'll swim well. A neoprene cap makes a measurable difference.
→ Winds averaging 19 km/h are common. Over 90km, riding steady power rather than chasing speed saves significant energy for the half-marathon. The headwind sections will test patience; the tailwind will reward it.
→ The bike packs 708m of climbing over 90km — that's a real day in the saddle. Keep cadence above 80rpm on the climbs and resist the urge to hammer. Every watt you spend above threshold on the bike comes out of your half-marathon. A compact crankset with a 28+ cassette is non-negotiable.