Waterfront Pedestrain Bridge - 140.7
20	Beuna Vista - 120.8
23	3	Sutersville - 118
32	13	10	Smitihton - 108.2
46	26	23	14	Dawson - 94.6
79	59	56	47	33	Confluence Corps Camp - 61.5
86	66	64	54	40	7	Fort Hill - 54.3
91	71	68	58	45	12	4	Markleton - 49.9
97	77	74	64	51	18	10	6	Rockwood - 43.8
104	84	81	72	58	25	18	13	7	Garrett - 36.6
109	89	86	76	63	30	22	18	12	5	Meyersdale - 31.9
116	96	93	84	70	37	30	25	19	12	7	Deal - 24.6
129	109	106	97	83	50	43	38	32	25	20	13	patty Baker Ln - 11.7
136	116	113	103	89	56	49	45	39	31	27	19	6	Cash Valley Rd - 5.2
8	12	15	24	38	71	78	83	89	96	101	108	121	127	Police parking lot - 132.5

Trail Lines are typically entered by tracing satellite imagery to extract latitude/longitude coordinates. The accuracy of these coordinates changes depending on the source of the photo and the precision of placement. I have seem satellite edges mismatched on the order 55 feet. Line work is sometimes extracted from the Open Street Map Project and from Strava heat maps.
>Milepost Known milepost (are placed on the map when they are visible in the satellite image or can be located via to visible features in the image. Other miles posts are extrapolated using calculations along the rail line. Note Railroads have also been known to realign trackage and not move existing mileage markers, only making an annotation on their paper maps.
Distances Above are based on the google map distance between two points along the line work.