VirtuSlo 4Endurance League is a race series with 6 races over a 6 week period.
Races will be held on Sunday from 9th November 2025 till 14th December 2025.
- 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

LEAGUE SCHEDULE
* Stage 1 and 2 - Single Pen Mass Start (*Pen A League Points)
Stage 1: 09.Nov’25 - France, Gentil 8 - 2 Laps (49.0km - 502m)
Stage 2: 16.Nov’25 - Greater London Loop Reverse - 2 Laps (41.4km - 511m)
* The Organizing Committee will manually edit results for Stage 1 and 2 and assign racers into lowest PEN possible for Stage 3.
* Stage 3 to 6 - Staggered PEN Starts +2min
Stage 3: 23.Nov’25 - Watopia’s Waistband - 2 Laps (53.2km - 196m)
Stage 4: 30.Nov’25 - Makuri, Shisa Shakedown - 1 Lap (53.5km - 556m)
Stage 5: 07.Dec’25 - Watopia, ZG25 Queen - 1 Lap (44.8km - 894m)
Stage 6: 14.Dec’25 - Watopia, The Big Ring - 1 Lap (51.1km - 274m)

Organizing Committee
PEN / Max Score
A / (TBD after Stage 2)
B / (TBD after Stage 2)
C / (TBD after Stage 2)
D / (TBD after Stage 2)
E / (TBD after Stage 2)
- You may increase your Zwift Racing Score up to 30-points over the PEN Range as a result of the race and your race will stand. If you breach PEN Range Limits by >30-points, then it is likely you didn’t have a maximal 5-minute effort in your 90-day history and you will be upgraded to the correct PEN.
- During the League riders starting in the lower PEN than in any of the previous Stages will be upgraded.
* Upgrades will include Time Penalty (example: Pen C to B is +1min, Pen D to B is +2mins)

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 daily finishing rank translates into League Points.
- Riders Highest Category Range during the 4Endurance League will be taken for the Overall Category Points Classification.
- Zwiftpower VirtuSlo 4Endurance League will show General Classification with 10 ZRS Sub Categories.
https://zwiftpower.com/league.php?id=2619Opens a new window

LEAGUE Points
Pen A - 200, 196, 193, 191, 190, 189, 188, 187, 186, 185,..., 1pts
Pen B - 175, 171, 168, 166, 165, 164, 163, 162, 161, 160,..., 1pts
Pen C - 150, 146, 143, 141, 140, 139, 138, 137, 136, 135,..., 1pts
Pen D - 125, 121, 118, 116, 115, 114, 113, 112, 111, 110,..., 1pts
Pen E - 100, 96, 93, 91, 90, 89, 88, 87, 86, 85,..., 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
- Neutralized Bikes and Wheels
- No TT Bikes
- Minimum Trainer Difficulty 30%
- Participants must be registered on zwiftpower.com to be included in the results
- Smart trainer or Power Meter 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

Zwiftpower results: questions, complaints, etc., please contact us https://virtuslo.cc/Opens a new window

#VirtuSlo #4Endurance #League