Cycling is an excellent way to get around Geneva and its surrounding areas cheaply and quickly. There are some really lovely walks in the countryside of Geneva and the city also promotes bike-riding in town too. The following link is very helpful. There are also maps which guide you through walks along different themes.
For information about the cost of hiring a bike, click here: (the Geneva association of bike hire Genève roule). From April until October you can hire a bike for free for a maximum of four hours from one of the 5 bike collection points around the city. You can return your bike to any one of the 5 collection points afterwards. You can also hire a bike from Geneva train station and return it to a different train station in Switzerland.
With Rent a bike, you can also hire a bike from Geneva train station and return it to a different train station in Switzerland.