Where might one go to find instructions on how to build a bike ramp?

Depending on your level of expertise and the type of ramp you want to build there are a number of places that provide plans and instructions on how to build a bike ramp. For a basic bike ramp Instructables has detailed pictures of how to assemble the ramp what materials and tools you will need, and a video of the ramp being used after construction. Plans 4 Ramps has a larger selection of ramp designs and you can also ask them to design you one.