VirtuSlo 4Endurance League is a race series with 6 races over a 6 week period.
Races will be held on Sunday from 11th January 2026 till 15th February 2026.
- Zone 1 at 10:00 CET / 09:00 UTC
- Zone 2 at 18:05 CET / 17:05 UTC
Pre-Registration for PRIZES required for residents of European Union and UK for more details visit https://virtuslo.cc/Opens a new window

Event: VirtuSlo 4Endurance GELS League
PEN -> zFTP W/kg / zMAP Wkg
A / > 4.4 W/kg / > 5.3 W/kg
B / < 4.4 W/kg / < 5.3 W/kg
C / < 4.0 W/kg / < 4.8 W/kg
D / < 3.7 W/kg / < 4.4 W/kg

Event: VirtuSlo 4Endurance BARS League
PEN -> zFTP W/kg / zMAP Wkg / Compound Score (5min Wkg * 5min Watts)
A / < 3.4 W/kg / < 4 W/kg / < 1450
B / < 3.1 W/kg / < 3.65 W/kg / < 1200
C / < 2.8 W/kg / < 3.3 W/kg / < 1000
D / < 2.5 W/kg / < 2.9 W/kg / < 800
- Race Control Review always reserves the right to review and reassign a classification at any time where the underlying data misclassifies a rider or a rider is clearly competing at the wrong level.
* Upgrades will include Time Penalty (example: Pen C to B is +1min, Pen D to B is +2mins)

LEAGUE SCHEDULE
Stage 1: 11.Jan’26
GELS - Watopia, Big Flat 8 - 2 Laps (60.7km - 212m)
BARS - Watopia, Big Flat 8 - 1 Lap (31.5km - 109m)
Stage 2: 18.Jan’26
GELS - Yorkshire, Royal Pump Room 8 - 2 Laps (55.4km - 980m)
BARS - Yorkshire, Double Loop - 1 Lap (29.7km - 547m)
Stage 3: 25.Jan’26
GELS - Innsbruck, Achterbahn - 1 Lap (47.7km - 990m)
BARS - Innsbruck, 2018 UCI Worlds Course Short Lap - 1 Lap (23.9km - 496m)
Stage 4: 01.Feb’26
GELS - Greatest London Flat - 2 Laps (54.6km - 386m)
BARS - London Calling - 1 Lap (31.7km - 211m)
Stage 5: 08.Feb’26
GELS - New York, Double Parked - 1 Lap (42.2km - 330m)
BARS - New York, Watts The Limit - 1 Lap (31.0km - 219m)
Stage 6: 15.Feb’26
GELS - Watopia, WBR Climbing Series - 1 Lap (43.7km - 1116m)
BARS - Watopia, Climbers Gambit - 1 Lap (28.0km - 671m)

LEAGUE CLASSIFICATION
- The winner of the day is rider First Across the Finish Line.
- The winner overall in the category will be the one with the highest cumulative score of 5 best races out of 6 (worst result will be deleted after week 3). Results at https://virtuslo.cc/Opens a new window
- To score points, riders must finish the stage and be listed in Zwiftpower.com results.
- Riders Highest Category during the 4Endurance League will be taken for the Overall Category Points Classification.
- Zwiftpower VirtuSlo 4Endurance League will show unofficial General Classification.

LEAGUE Points
Event: VirtuSlo 4Endurance GELS League
Pen A - 200, 196, 193, 191, 190, 189, 188, 187, 186, 185,..., 1pts
Pen B - 180, 176, 173, 171, 170, 169, 168, 167, 166, 165,..., 1pts
Pen C - 160, 156, 153, 151, 150, 149, 148, 147, 146, 145,..., 1pts
Pen D - 140, 136, 133, 131, 130, 129, 128, 127, 126, 125,..., 1pts
Event: VirtuSlo 4Endurance BARS League
Pen A - 120, 116, 113, 111, 110, 109, 108, 107, 106, 105,..., 1pts
Pen B - 100, 96, 93, 91, 90, 89, 88, 87, 86, 85,..., 1pts
Pen C - 80, 76, 73, 71, 70, 69, 68, 67, 66, 65,..., 1pts
Pen D - 60, 56, 53, 51, 50, 49, 48, 47, 46, 45,..., 1pts

MANDATORY REQUIREMENTS
- Zwift Activities must be saved PUBLIC for verification.
- World Tour Level Performances above the limits stated below must be supported by DUAL POWER Recordings uploaded to Zwiftpower and with margin off error of less than 4%. Outside KOM efforts on Strava can be used for verification of Dual Power analysis.
*MEN: above 4.8W/kg or 350W for 20min, 5.5W/kg or 425W for 5min, 9W/kg for 1min.
**WOMEN: above 4.5W/kg or 280W for 20min, 5W/kg or 325w for 5min, 7.5W/kg for 1min.

RULES AND RACE Settings
- No Powerups
- No TT Bikes
- Minimum Trainer Difficulty 30% (NO ERG)
- Participants must be registered on zwiftpower.com to be included in the results
- Smart trainer or Power Meter with Cadence sensor Paired is required.
- Heart Rate Monitor required.
- No Indoor Bikes without Controlled Resistance (Cadence=Power)
- Sticky Watts or unusual pedalling technique to get an unrealistic advantage will result in DQ
- The organizer reserves the right to disqualify a participant for any other justified reason.

Zwiftpower results: questions, complaints, etc., please contact us https://virtuslo.cc/Opens a new window
- Any complaints must be submitted within 24 hours of the start of the event.
- Official results will be published by Wednesday of the respective week.
- No result corrections will be accepted after publication of Official Results.
Zwiftpower Disqualification Codes
DQ_NOT_PUBLIC - activities that aren't public (before you save, set the activity to public or set it as default)
DQ_NO_POWER - missing power. As per rules, every rider is required at least one power source.
DQ_HR - heart rate monitor required in this race.
DQ_ELITE_POWER - elite performance without DualPower. See above for power/wkg cut-off.
DQ_STICKY_WATTS - flagged sticky watts.
DQ_NO_CADENCE - missing cadence.
DQ_ERG_MODE - ERG mode not allowed.
DQ_MICROBURSTS - microbursts detected.
DQ_DUAL_ERROR - dual power data error margin exceeded. See above for clarification.
DQ_FLAGGED_SPINNING - spinning bike not allowed.
Important note: We are 100% dependent on Zwiftpower monitoring and their statistical service.

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