Calder Boat Ramp is a key public access point on the Saint Joe River in Shoshone County, Idaho, serving as a common take-out location for guided float trips and recreational boaters.

The ramp provides access to a popular 4-5 hour float from Big Creek to Calder, making it an important endpoint for summer recreation on this Wild & Scenic river. Calder also has a store nearby, providing convenient services for river users.