Hi SamC, canny help you with the riding down by the Verdon, but assuming it’s St Gervais in Haute Savoie, then you’ve got loads to go at there. I’d recommend buying the IGN maps 3531 ET St Gervais and 3531 OT Megeve to get the best of the area (or online mapping of your choice)
From St Gervais itself the Bettex lift has access to the “whizz” flow trail which, though it’s not going to keep you amused for more than a couple laps, is great fun for those couple of laps. You then have trails from the top that can take you down to Megeve. Alas Megeve has really cut back on their lifts this year, however below Jaillet there are a variety of built and natural trails, whilst the Rochebrun lift is more of the natural trails, a little bitty unfortunately. The Mont d’Arbois lift then brings you back up to the top of the Bettex lift and the Whizz flow trail.
Heading south from Bettex there’sa bit of a hoof to a couple of great trails that descend (eventually, you have to traverse a bit first…) to LEs Contamines. Typrically it’s the harder to reach further away one that’s the better descent. Les Contamines also has its own bike park which is fun enough for a few laps, but then there’s easily a full day of lapping the lifts to tick off all the wee singletracks marked on the map. If you then head up the valley further towards the Col du Bonhomme you get a right cracking descent back down the Roman Road to Les Contamines, best done early or late to minimise the number of walkers to maximise flow. Conviniently there’s the Nant Borant refuge up there to sit with a coffee/beer/icecream whilst you wait for the traffic to quieten.
Then there’s Chamonix just over the hill. It has a bit of riding too… I’m not sure what the tramway costs for uplift, but bikes area taken on the 1st and last 3 trains of the day so I’ve included a load of great trails from the tramway below.
Some links: http://www.chamonixbikeblog.com/2014/les-contamines-no-bad/
http://www.chamonixbikeblog.com/tag/st-gervais/