The Road to Saint James- described in my book The Pilgrimage - is an interesting trekking of approximately 500 miles. You can do that in one month.
In 2006, I made a pilgrimage of 90 days and launched a blog sharing with my readers my impressions. If you wish to visit it, please click here.
As I receive several emails asking about the conditions of the pilgrimage, I decided to put some links that may help you to do it.
El Peregrino, la Leyenda y la Historia, los Caminos [Spanish] El Románico en el Camino de Santiago [Spanish] The Road To Santiago [several links in English] Associação do Caminho de Santiago (Brasil) [Portuguese] Caminho de Santiago (Guy Veloso) [Portuguese] Pagina oficial de la Xunta de Galicia [Spanish] Jakobsweg [German and English] Refugio Acacio e Orietta - Apadrinhando por Paulo Coelho [Portuguese]