LAKELANDER GRAVEL GRINDER - ENTRIES ARE NOW OPEN This event is organised by Primal Challenges under the auspices of Cycling Ireland and hosted by Mallard Flyers Cycling Club. Lakelander Gravel Grinder is supported by Fermanagh & Omagh District Council and Marble Arch Caves Global Geopark. Lakelander Gravel Grinder - Big Dog 100k Challenge Welcome to the inaugural Lakelander Gravel Grinder, Ireland's ultimate off-road cycle challenge. Hosted by Mallard Flyers CC the Big Dog Challenge has been expertly designed by our experienced recce team in order to challenge participants physically and mentally over a demanding 100 kilometre route with stunning views across County Fermanagh and beyond. A rolling start from the village of Belcoo will take riders to the entrance of Ballintempo Forest to begin their Big Dog challenge. With 1,880m elevation ahead expect tough climbs, fast sweeping downhills and rolling countryside passing loughs, stunning vistas and even a few Game of Thrones filming locations.