Barcelona mixes a regular street grid, waterfront movement, parks, and steep transitions toward the hills. Heat, crowds, cycle lanes, and surface changes should shape the route decision.
Route contexts
The waterfront can support longer public routes with strong seasonal crowd differences.
The Eixample grid creates clear blocks but frequent crossings interrupt rhythm.
Montjuïc adds elevation and varied access, so the exact public route should be confirmed in advance.
Run the real city first
Plan around heat, hydration, traffic, and current public access. Avoid event branding or implying that closed race courses are available.