Running

Semi-Marathon International de Lille

Semi-Marathon International de Lille takes place on Sun, Oct 25, 2026 in Lille, France. The main route is 21.1 km.

The Semi-Marathon International de Lille is a fast and popular flat road race held in the historic streets of Lille, France.

What this race demands

The Semi-Marathon International de Lille demands sustained running fitness to cover the 21.1 km distance efficiently on a fast, flat road course.

Aerobic endurance

Covering the half-marathon distance of 21.1 kilometers requires sustained cardiovascular output and efficient pacing throughout the event.

Speed maintenance

The flat profile of the course permits a consistent rhythm, placing a premium on holding a steady target pace without relief climbs.

Pick the level closest to yours for an estimate of finish time on this course and the training a solid preparation needs.

Estimated finish

1:45–2:10

Peak-week training

5–7 h/week

A model estimate from distance, climbing and level, not a promise. Conditions, drafting and pacing move it.

IntervalCoach turns those weekly hours into a concrete plan built around your actual fitness. Start with this race as your goal

Race day at Semi-Marathon International de Lille is 9 weeks away. This is how a coach divides that time. The first phase starts now.

01Build3 weeks · Aug 24, 2026 – Sep 13, 2026
Progressive overload: training load climbs in waves, with harder weeks stacked on the base and planned recovery weeks that let the gains land.
02Peak3 weeks · Sep 14, 2026 – Oct 4, 2026
The hardest weeks of the plan: race-specific intensity at nearly full training load, sharpening exactly what this race asks for.
03Taper2 weeks · Oct 5, 2026 – Oct 18, 2026
Volume drops while intensity stays: short, sharp efforts keep the legs awake as fatigue drains away.
04Race week1 week · Oct 19, 2026 – Oct 25, 2026
Openers, rest and logistics. The work is done; the job now is arriving fresh.

Organising this race?