Last update 14 October 2019
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Mileages are given in the form miles.chains. Figures prefixed with ≈ are approximate, items in parentheses are not on this route but are given for reference.
0.00 Northolt Junction with ANL (10.15) and NAJ1 (0.00) 0.07 SOUTH RUISLIP (0.50) RUISLIP GARDENS [London Underground] 0.56 RUISLIP GARDENS 1.68 WEST RUISLIP 1.78 connection to Ruislip depot [London Underground] 3.27 SOUTH HAREFIELD 3.44 Denham East Junction with Denham East Curve (0.00) 3.76 Denham West Junction with DEM (0.00) 4.50 DENHAM 5.42 DENHAM GOLF CLUB 7.18 GERRARDS CROSS 9.75 SEER GREEN [formerly S.G. & JORDANS] 11.41 BEACONSFIELD 15.62 Gomme's siding 16.11 Wycombe South Junction with WBB (33.68) 16.29 HIGH WYCOMBE 17.14 High Wycombe goods depot 18.48 WEST WYCOMBE 21.27 SAUNDERTON 21.76 divergence of up and down lines 24.15 convergence of up and down lines 24.40 PRINCES RISBOROUGH 24.48 Princes Risborough Junction with PRA (42.31) 24.48 junction with PRC (0.00) and PRT/THA (0.00) 27.16 ILMER 29.74 HADDENHAM 30.25 HADDENHAM & THAME PARKWAY 33.55 Ashendon Junction with GUA (165.21) [up line] 33.69 Ashendon Junction with NAJ3 (0.00) Note that Ashendon Junction down line junction is on NAJ3