6-Week Spring Gran Fondo Stelvio Santini Training Plan (Zwift compatible)

If you’re an intermediate cyclist coming out of winter and setting your sights on the Gran Fondo Stelvio Santini, this 6-week spring plan is designed to rebuild momentum, lift fitness, and establish a strong foundation for the specific demands of this iconic mountain event. It’s the ideal transition from winter consistency into focused preparation for one of Europe’s most challenging and celebrated sportives.

Who’s it for?
This training plan is aimed at intermediate cyclists with a solid winter base who are ready to begin a more purposeful build toward the Stelvio Santini. Whether you’ve trained consistently through winter or are sharpening things up as the days lengthen, the plan provides structure and direction at exactly the right point in the season. It helps convert general winter fitness into the strength, stamina, and confidence required for prolonged climbing and cumulative fatigue at altitude.

Is it for you?
This plan assumes you’re comfortable riding both indoors (such as Zwift) and outdoors as conditions improve, and happy combining structured quality sessions with longer endurance rides. It’s ideal if you want to transition smoothly into spring training without burning out, while developing the key qualities needed for the Stelvio Santini: sustained climbing strength, efficient pacing over long ascents, the ability to hold tempo for extended periods, and maintaining composure deep into a long and demanding mountain day.

You’ll be building the foundations required for iconic climbs such as the Passo dello Stelvio, Umbrail Pass, and surrounding high-alpine roads, where length, gradient, altitude, and accumulated fatigue place a premium on aerobic strength, muscular endurance, and disciplined pacing.

What’s involved?
The plan builds progressively over 6 weeks, balancing structure with flexibility to allow consistent improvement without excessive fatigue. Each week works across the key training zones, using indoor sessions for precision and control alongside outdoor rides to develop endurance, climbing strength, and real-world durability. There’s a strong emphasis on aerobic conditioning, sustained tempo and sweet-spot work, strength endurance, and fatigue resistance, all crucial for long Alpine climbs and repeated high-mountain efforts.

The goal isn’t to peak during these six weeks. Instead, you’ll come out of this spring block fitter, stronger, and more resilient, perfectly positioned to move into the final, more Gran Fondo Stelvio Santini–specific phase of preparation feeling confident, motivated, and ready to train with real intent for the mountains ahead.