The book comprises of dozens of maps at various scales, all based on the original The Lord of the Rings maps drawn by Christopher Tolkien from his father's sketches. Each map is on a right-hand page in landscape format and depicts physical features in black and contour lines in red. Routes taken by characters on roads and paths are shown in dashed black and red; routes off-road are in red only. Arrows show the direction of travel and dates are listed in red. Scales along the top and left of each map show the distance east/west and north/south from Bag End.
Each numbered map is accompanied by a description, in which the author describes the portion of the route indicated, often justifying her topographical decisions with quotes from the book. In some cases she points out discrepancies in the topographical descriptions, occasionally for instance altering the course of a road or a river on the grounds that it would otherwise be inconsistent with Tolkien's other descriptions of the terrain.
Christopher Tolkien refers to Journeys of Frodo a number of times in The History of The Lord of the Rings, often agreeing with Strachey's conclusions, although in some occasions also disagreeing.