Accordng to Morey (2009), after hibernation, Great Basin Spadefoot Toads become active on the surface after the first warm spring evenings and move from winter habitat to breeding ponds, where they will breed in springs, sluggish streams, and other permanent or ephemeral water bodies. Reproduction in this species is aquatic. In BC, they will breed in a variety of habitats, 'such as irrigated depressions, ponds, pools, or ditches, but seem to prefer small vernal pools that fill in and dry up each year' (British Columbia Southern Interior Reptile and Amphibian Recovery Team 2008). BC Frogwatch (BC Ministry of Environment 2009) provides the following reproductive information: 'males gather and call at small ponds, females join the males at the ponds, mate, then lay hundreds of eggs, which they attach to sticks and pebbles underwater, eggs hatch within a week in cool weather, or as quickly as two days if it is warm, and the tadpoles transform into toadlets six to eight weeks after hatching, toads become mature in their second or third year, and may live up to ten years'. Further detailed information on reproduction, including clutch size, is provided by
AmphibiaWeb.