27JUN
GravelVery hardBack to events
United StatesRoad
Levi's GranFondo 2027
Levi's GranFondo 2027 takes place in Windsor, California on 24 April, with six official road routes from an 8 mile family ride to the 138 mile Growler over Sonoma County climbs including King Ridge and The Geysers.
Windsor, California, United StatesOpen
- Dates
- Sat, Apr 24, 2027
- Type
- Road
- Routes
- 13 · 49 · 99 · 165 km
- altitude range
- 5–528 m
[ 00 ]
The course
Track, profile and categorized climbs at a glance. The map and altimetry come from the real GPX track; tap a numbered climb for its detail.
Categorized climbs
10 climbsTap a numbered climb to see its detail.
[ 01 ]
Can I do this?
How long you would be in the saddle at your level. Not one single time — the one that matches you.
Your level
A Intermediate rider (3.0 W/kg W/kg) would cross Gran in
6h44
regular group rides · 72 kg reference · no drafting · variable pacing
See all four levels
Beginnerfirst long rides
2.5 W/kg
7h44
Intermediateregular group rides
3.0 W/kg
6h44
Advancedstructured training
3.5 W/kg
6h03
Eliteamateur racer
4.0 W/kg
5h33
72 kg referencesurface-based bike and tiresno draftingvariable pacing
Calculate your exact timeEnter your FTP and weight in the simulator to see your time on every route.
[ 02 ]
Which route should I pick?
Relative demand and the key numbers for each route. Pick one and the rest of the page adapts.
[ 03 ]
Do I have time to get ready?
What each route demands versus the time left to the start.
184days to the start. Enough to prepare Gran: it asks for ~14 weeks of specific training.
Compare what each route demands
Gran14 weeksVery hard
Medio8 weeksHard
Piccolo6 weeksModerate
Family Fondo4 weeks
Make it your goalGran asks for ~14 weeks of specific preparation. Start your plan with margin and arrive ready.
Get ready for Gran[ 04 ]
Pacing & fuel
Reference-rider estimate (~6h05 · Gran). Your time and fuel scale with your fitness — run the simulator for a personal plan.
Effort per climb
- distance 18 kmKM 1888–98% FTPThreshold
- distance 52 kmKM 5290–102% FTPThreshold
- distance 55 kmKM 55 · the longest86–94% FTPThreshold
- distance 65 kmKM 6590–102% FTPThreshold
- distance 77 kmKM 7795–110% FTPVO2
- distance 82 kmKM 8280–90% FTPTempo
- distance 86 kmKM 8687–97% FTPThreshold
- distance 120 kmKM 12092–107% FTPThreshold
- distance 124 kmKM 12477–87% FTPTempo
- distance 132 kmKM 13277–87% FTPTempo
Fuel per hour
80–100 gCarbs
500–750 mlFluid
500–700 mgSodium
What you carry · whole event
4–6bottles750 ml each · 3–5 L total
16–20gels30 g each · 487–608 g total
Fluid and sodium are adjusted to the event's typical conditions (~15 °C). General guidance — adjust to heat, your gut tolerance, and how the day unfolds.
[ ☀ ]
Race-week weather
Typical conditions for the event month, downscaled to this route's elevation.
12–15°CTemperatureMild
11%Rain chanceUnlikely
8km/hWindLight breeze
valley → summit · Normals 2022–2025 · Source: Open-Meteo · ERA5/Copernicus (CC BY 4.0)
[ 05 ]
What do I need to know?
Ridium's training read and the caveats before you trust the times.
Training read · Ridium AIThe Gran is a demanding 164.6 km Sonoma County road route with roughly 3,075 m of climbing across 10 detected climbs and gradients reaching 18%. Most of the distance is flat or rolling, but the difficulty is concentrated in repeated steep climbs and technical descents, so it rewards sustained climbing strength paired with deep endurance.
- Climbing
Build sustained climbing strength for the 10 detected climbs, anchored by a category-2 effort near km 55-64 (about 8.6 km gaining 395 m at roughly 4.6% average) plus several shorter ramps around 7-8% such as km 77 and km 120.
- Endurance
Anchor long aerobic rides on the 164.6 km distance and roughly 3,075 m of total elevation gain so you can stay strong on the later climbs after km 100 rather than fading.
- Technical
Practice steep, repeated climbing and confident descending, since gradients reach 18% and the GPX flags multiple technical descent sectors, including pitches in the first few kilometers and after the early climb near km 22.
- Pacing
Pace the steep ramps conservatively early; with around 4.8 km of steep terrain and only about 6.9 km of moderate climbing, spikes of power above 7% gradient can be costly if repeated over the full distance.
- Fueling
Rehearse on-bike fueling during long training rides so intake stays consistent across a route of this length, where the GPX flags fueling as a key demand.
- Endurance
If preparing specifically for this route, a preparation window of roughly 14 weeks gives time to build the climbing-specific endurance the profile demands.
[ + ]