DateExpected
Mid June 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
Logaland, Reykholt, Borgarfjörður
Borgarfjörður
Countdown
June
The short one of the three Grefillinn distances: a 48 km gravel loop with gentle climbing that starts at 11:00, so there's no early alarm. A friendly way into gravel.
Key facts
01Cut-off is 14:30, which is 3.5 hours after the start
02Self-supported: you navigate by GPS, so load the route first
03Minimum age 18 at sign-up; e-bikes are not allowed
Create a free training plan for the Grefillinn 48 km
7-day free trial, no card required
The course
The route
Borgarfjörður
Distance48km
Total climb357m
StartElevation
0 kmDrag map to rotate47.6 km
Weather
Mid-June, Borgarfjörður
11°CTypical high
6°CTypical low
0°CColdest in 20 years
48%Days with rain
Highs around 11°C and lows around 6°C, but it has dropped to 0°C. Rain on 48% of days. Pack for the cold end, not the average.
NASA POWER data, 2006-2025, the week either side of race day
Results
Course verified. Results not yet available.
Organiser
OrganiserGrefillinn, hosted by the cycling division of Breiðablik
Websitegrefillinn.is
Instagram@grefillinn
Running since2023
Training
Training for the Grefillinn 48 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 Grefillinn 48 km plan targets
Typical sessions
48 km with 357 m of climbing
Endurance and fatigue resistance over the full distance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long endurance rides building toward the full distance
Threshold and sweet-spot work for sustained power
Group rides for drafting and bunch-riding skills
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 Grefillinn 48 km plan.
7-day free trial, no card required.
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