"Nashestvie" is the biggest rock festival in Russia. And many say it's the worst organised.

Each year since its first in 1999, the rockfest, based near the Moscow region, has faced complications - ranging from poor transport to lack of toilets and security overdrive. Two years ago, 80,000 people were forced to share one single fresh water tap. The festival prohibited bottled water being brought onto the premises, and yet refused to sell it either. It has since changed its policy.

This year's event was held a month earlier than normal, from 4-6 July. It won't only be remembered for its great line-up, but also for quantities of mud that could only rival the UK's Glastonbury Festival. Heavy rain meant that not even vehicles could travel accross the sodden ground. Now back from the festival, attendees post their photos and videos online. One of our Observers for Russia, Ostap Karmodi, has compiled some of the muddiest.