Quick answer: The Camino de Santiago is a network of pilgrim routes to Santiago de Compostela; the Camino Francés (~780km, ~5 weeks) is the most popular.
The Camino is a centuries-old pilgrimage across northern Spain (and beyond), walked today by people of all backgrounds. Here’s the essential primer.
The main routes
The Camino Francés (~780km from the French Pyrenees, ~5 weeks) is the classic; the Camino Portugués (~260km, ~2 weeks) and the coastal Camino del Norte are popular alternatives. Many walk just the final 100km from Sarria to qualify for the certificate.
When to go
Late spring (May–June) and early autumn (September–October) offer the best weather and fewer crowds; summer is hot and busy.
How it works
Carry a pilgrim ‘credential’ to stamp and stay in albergues (pilgrim hostels). Walk an average of 20–25km a day.
Tips
Train beforehand, pack as light as possible, break in your shoes, and book ahead in peak season. Collect your Compostela certificate on arrival in Santiago.