Audax Australia Cycling Club is a non profit national cycling organisation specialising in non-competitive long distance bicycle rides from 50 to 1200 km, called "randonnees". Tasmania is a fairly small Audax region, but events like the Ash Dash are still legendary in Tasmania, and the club has an active events calendar throughout the year.
The Avanti Plus Hellfire Cup is a 4 day bi-annual team mountain biking event with great onsite services and entertainment. It's survived fire, flood, plague and even vehicle smahes to carry on and the dates for the 2017 event has already been set (16-19 November).
The Coles Bay Triathlon is held at Coles Bay, on the east coast of Tasmania, Australia. The event offers a 1.9km swim, 90km ride and 21.1km run (Half) and a 500/20/5 (sprint). The next race will be held on Saturday 24 February, 2018.
The Endorfun Tasmanian trail running series showcases some of Tassie's finest tracks and trails for off road running. This 32km event in the Blue Tiers will be run on October 29, 2017.
The Freycinet Challenge showcases Tasmania as a premier multisport destination, pitting some of the country's best competitors against some of the world's most challenging conditions, all within Tasmania's stunning scenic backdrop.
The Lumberjack is a 2 day stage race with exciting stages and great trails. The event has been rescheduled to 29-30 April, 2017.
Maria Island makes for a great overnight cycling trip, allowing you a chance to not only explore the more commonly visited sites on the Northern Island, but also a chance to head down to the much less visited Southern Island.
The route described below sets aside the first day for a leisurely exploration of the Southern end of the Island on the first day, overnight camping at Encampment Cove, and then a walk up Mt Maria and exploration of the more visited Northern end of the Island on the second day. However, once on the Island, you can mix and match the rides to your own liking and unless you're really keen to get away from it all, it might make more sense to base yourself at Darlington and just do day trips (see route options).
Maria Island has an amazing abundance of wildlife, so it can be worth taking a good torch for a bit of a night time look around.