John 7:10

‘But when his brothers were gone to the Feast, then he also went up, not publicly but as it were in secret.'

Once His brothers and the Galilean party had gone up to the feast, however, no doubt to be given the onceover by the Judaiser's spies, Jesus followed quietly and without any fuss. He did not want to draw attention to Himself until He was ready. This suggests that He knew that the authorities would be watching the road for the arrival of His family and their fellow Nazarenes, expecting Him to be with them. No doubt He took a circuitous route so as to avoid their attention.