The final leg of the Chain Reaction Cycles MTB Marathon Series will finish with a band in Ruthin, north Wales, this weekend – with a double-header that also includes the second Exposure Lights Big Night Out of 2011.

The night marathon kicks off at 7.30pm on Saturday, with 300 riders contesting the 40km route. If you haven’t any lights and are tempted to give it a bash then Chain Reaction Cycles will be offering Exposure Lights for sale, while there will be a charging station on the course in case you run out of juice.

Meanwhile, the final MTB Marathon event will have four routes to choose from – 30km, 50km, 75km and 100km – on Sunday.

Both events tackle the Clwydian Range; a 35km long chain of hills running from Prestatyn to Llandegla, rising to 554 metres above sea level at their highest point.

With oodles of singletrack lacing the length and breadth of the hills – and a fair collection of steep, fast descents – the Clwydians are a fitting venue for the final round of the year.

Exposure Lights Big Night Out entry costs £32, while a spot in the MTB Marathon ranges from £22-£32 depending on which course you opt for. Riders who want to tackle both events can enter for the discount price of £47.

There’s still time to enter online, so head this way to secure your spot.