How do we make TRAIN RESERVATIONS to Pamplona?

The website www.renfe.com is Spain's train schedule site......However, please know that the train schedules are not posted until 61 days prior to the departure date. For example, if you want to buy train tickets for a Madrid to Pamplona trip on July 5th, check with the www.renfe.com website on May 5th...Trains in Spain are very punctual, clean and quite economical. Enjoy!