The following account is taken from Franklin et al. (1979):
The breeding period of Galapagos Rail is little studied, but the few known nests were found from September to April. Galapagos Rail constructs a deep, partially covered cup nest on the ground with a single entrance on the side of the nest. The stems of herbaceous vegetation are used as a building material. Galapagos Rail lays a clutch of 3-6 beige eggs that have some reddish brown and gray speckles, ca 1 mm in diameter. Parents share in the incubation duties, with incubation lasting 23-25 days. Incubation duties are exchanged every 50 mins, and during the exchange mutual preening occurs. During incubation, adults will forage no farther than 15 m from the nest. Growth from newly hatched chick to adult takes approximately 80-85 days.