DateExpected
Late September 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
Praça da República, Viana do Castelo
Viana do Castelo, Viana do Castelo
Countdown
September
A 100 km run that starts at 10 pm in Viana do Castelo and ends in Dem, so you spend the night on the trail and chase the sunrise. With 4,443 m of climbing, it is a proper ultra.
Key facts
01Overnight start at 22:00, so a head torch is part of the plan
0224-hour cutoff to reach Dem
03Competitive entry is for runners aged 18 or over
Create a free training plan for the Grande Trail da Serra d’Arga 100 km
7-day free trial, no card required
The course
The route
Viana do Castelo
Distance100km
Total climb4,443m
StartElevation
0 kmDrag map to rotate85.5 km
Weather
Late-September, Viana do Castelo
23°CTypical high
15°CTypical low
10°CColdest in 20 years
26%Days with rain
Highs around 23°C and lows around 15°C, but it has dropped to 10°C. Rain on 26% of days.
NASA POWER data, 2006-2025, the week either side of race day
Results
Course verified. Results not yet available.
Organiser
Training
Training for the Grande Trail da Serra d’Arga 100 km
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a Grande Trail da Serra d’Arga 100 km plan targets
Typical sessions
100 km with 4,443 m of climbing
Time on feet and fatigue resistance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long runs that build time on your feet
Tempo and threshold sessions to hold race pace
Hill reps and vert to prepare the climbs and descents
Back-to-back weekend runs for fatigue resistance
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your Grande Trail da Serra d’Arga 100 km plan.
7-day free trial, no card required.
Other races at Grande Trail da Serra d’Arga
More events in September in Portugal
Penacova Trail do CentroExpected Early September 2027 · Penacova→Trail Boneca DouroExpected Mid September 2027 · Sebolido→Trail Rios e Levadas Teaga AventuraExpected Mid September 2027 · Arcozelo das Maias→Nexe 107 1.2 – Trail Ultra EnduranceExpected Mid September 2027 · Santa Bárbara de Nexe→Nexe 107 1.2 – Trail Ultra EnduranceExpected Mid September 2027 · Santa Bárbara de Nexe→TdM – Trail dos MorcegosExpected Mid September 2027 · Relva→
