flag

Mont-Blanc Marathon 2024, course map and altimetry

Mont-Blanc Marathon 2024: route, altimetry, gpx

Note: "Mont-Blanc Marathon 2024" is NOT organized by goandrace.com

Mont-Blanc Marathon 2024 course map. Lenght: 42 km (26.1 mi).

42 km (26.1 mi) course map of the event "Mont-Blanc Marathon 2024" in Chamonix (Friday, June 28, 2024). Explore the route!

Do you want to fly over the path with a Google Earth 3D video? Click on the following link: Mont-Blanc Marathon 2024, fly over the path (3D video).

GPS track - .gpx file download

Download the gps race path by clicking here. You can send the .gpx file to your Garmin watch or other compatible device and follow the path. For instructions on how to upload the GPX file onto your Garmin watch click here.

 .gpx file download

NB: it is possible that the length calculated from the gpx file is greater than that of the race, with an error typically of 1-2%, so for example a half-marathon could be 2-300 meters longer.

Click the following link to visit the Mont-Blanc Marathon 2024 event page.

Mont-Blanc Marathon 2024: route altimetric information


Mont-Blanc Marathon 2024: GNR-GAP index (v 1.0, experimental, see more)

Mont-Blanc Marathon 2024: interactive route

You can set the km (or mile) markers and you can select different types of layers (Satellite or Openstreetmap).

Mont-Blanc Marathon 2024: altimetry graph

Mont-Blanc Marathon 2024: slope graph

Mont-Blanc Marathon 2024: percentage distribution of slope

Mont-Blanc Marathon 2024: Km by km route altimetry analysis

Lap Start Alt. End Alt. Diff. Alt. Aver. Slope Min Alt. Max Alt. Tot Climb Tot Descent
KM 0-1 1041 1039 -2 -0.2% 1039 1046 5 7
KM 1-2 1039 1055 +16 +1.6% 1039 1055 16 0
KM 2-3 1055 1074 +19 +1.9% 1055 1074 19 0
KM 3-4 1074 1119 +45 +4.5% 1074 1118 45 0
KM 4-5 1119 1218 +99 +9.9% 1119 1218 99 0
KM 5-6 1218 1209 -9 -0.9% 1210 1256 50 59
KM 6-7 1209 1241 +32 +3.2% 1201 1240 39 8
KM 7-8 1241 1293 +52 +5.2% 1242 1307 66 13
KM 8-9 1293 1286 -7 -0.7% 1266 1293 24 32
KM 9-10 1286 1274 -11 -1.1% 1257 1292 14 25
KM 10-11 1274 1406 +132 +13.2% 1273 1409 135 3
KM 11-12 1406 1482 +76 +7.6% 1406 1482 80 4
KM 12-13 1482 1488 +6 +0.6% 1481 1525 38 33
KM 13-14 1488 1487 -1 -0.1% 1475 1488 12 13
KM 14-15 1487 1591 +104 +10.4% 1488 1590 112 8
KM 15-16 1591 1802 +211 +21.1% 1592 1801 211 0
KM 16-17 1802 2016 +214 +21.4% 1802 2016 214 0
KM 17-18 2016 2155 +139 +13.9% 2017 2154 139 0
KM 18-19 2155 2048 -107 -10.7% 2049 2171 14 121
KM 19-20 2048 1933 -115 -11.5% 1933 2048 0 115
KM 20-21 1933 1762 -171 -17.1% 1763 1932 7 179
KM 21-22 1762 1623 -139 -13.9% 1624 1761 0 139
KM 22-23 1623 1370 -253 -25.3% 1372 1622 0 253
KM 23-24 1370 1281 -89 -8.9% 1283 1369 0 89
KM 24-25 1281 1360 +79 +7.9% 1268 1359 92 13
KM 25-26 1360 1323 -36 -3.6% 1323 1376 15 51
KM 26-27 1323 1383 +60 +6.0% 1324 1383 60 0
KM 27-28 1383 1449 +66 +6.6% 1384 1449 69 3
KM 28-29 1449 1434 -16 -1.6% 1434 1474 22 38
KM 29-30 1434 1566 +132 +13.2% 1424 1566 142 10
KM 30-31 1566 1692 +126 +12.6% 1566 1711 139 13
KM 31-32 1692 1452 -240 -24.0% 1452 1691 0 240
KM 32-33 1452 1511 +58 +5.8% 1453 1529 81 23
KM 33-34 1511 1617 +107 +10.7% 1495 1616 114 7
KM 34-35 1617 1805 +188 +18.8% 1618 1804 188 0
KM 35-36 1805 1870 +65 +6.5% 1807 1887 86 21
KM 36-37 1870 1884 +15 +1.5% 1857 1889 45 31
KM 37-38 1884 1835 -49 -4.9% 1837 1887 11 60
KM 38-39 1835 1664 -172 -17.2% 1662 1835 0 172
KM 39-40 1664 1446 -218 -21.8% 1447 1663 0 218
KM 40-41 1446 1272 -174 -17.4% 1273 1452 0 174
KM 41-42 1272 1234 -38 -3.8% 1214 1271 19 57
KM 42-43 1234 1054 -180 -18.0% 1055 1239 4 184
KM 43-44 1054 1039 -15 -1.5% 1039 1057 11 25
KM 44-44.11 1039 1041 +2 +0.2% 1040 1041 9 0

GNR-GAP index - Go&Race Algorithm Estimate

Based on the elevation profile analysis, running on this course is estimated to result in a pace that is 51.5% slower.


For example, a runner who maintains a pace of 5'00"/km (8'03"/mi) on a flat 44.1 km course, corresponding to a finish time of 3h40'30", is estimated to complete this course in 5h34'03". The recalculated average pace (GAP) improves to 7'34"/km (12'11"/mi), making it 2'34"/km (4'09"/mi) slower.


The following graph illustrates the Pace Adjustment (PA) factor applied to the pace along the course. The horizontal red line represents a PA of 1, meaning no pace adjustment. Above the line, the pace is slower; below the line, it is faster. The table below also provides estimates for other pace ranges.



Predict your race or analyze your performance!

This following table shows simulations for paces between 3 and 6'/km.


RACE PREDICTION
To estimate a possible race time, use the "Pace" or "Time without slopes" column, which are valid for a flat course.
For example, if you think you can cover this distance on a flat course at a pace of 4'40"/km (or 7'31"/mi), i.e. in a time of 3h25'48", the estimate is to complete this course in 5h11'46", corresponding to a pace of 7'04"/km (or 11'23"/mi).

PERFORMANCE ANALYSIS
If you have run this race, use the table to estimate the equivalent time on a flat course. Check the "GAP" column and find the value closest to your pace, or compare the "Time with slopes" column with your time: on the same row you will find the pace and the equivalent time on a flat course in the "Pace" and "Time without slopes" columns.
For example, a time of 5h00'39" (pace of 6'49"/km or 10'58"/mi) corresponds to a time of 3h18'27" on a flat course (pace of 4'30"/km or 7'15"/mi).

Pace (min/km) Pace (min/mile) Time without slopes (hh:mm:ss) Time with slopes (hh:mm:ss) GAP (min/km) Δ Pace (min/km) GAP (min/mile) Δ Pace (min/mile)
3'00"4'50"2h12'18"3h20'26"4'33"1'33"7'19"2'29"
3'10"5'06"2h19'39"3h31'34"4'48"1'38"7'43"2'37"
3'20"5'22"2h27'00"3h42'42"5'03"1'43"8'08"2'46"
3'30"5'38"2h34'21"3h53'50"5'18"1'48"8'32"2'54"
3'40"5'54"2h41'42"4h04'58"5'33"1'53"8'56"3'02"
3'50"6'10"2h49'03"4h16'06"5'48"1'58"9'21"3'11"
4'00"6'26"2h56'24"4h27'14"6'04"2'04"9'45"3'19"
4'10"6'42"3h03'45"4h38'22"6'19"2'09"10'10"3'27"
4'20"6'58"3h11'06"4h49'30"6'34"2'14"10'34"3'35"
4'30"7'15"3h18'27"5h00'39"6'49"2'19"10'58"3'44"
4'40"7'31"3h25'48"5h11'47"7'04"2'24"11'23"3'52"
4'50"7'47"3h33'09"5h22'55"7'19"2'29"11'47"4'00"
5'00"8'03"3h40'30"5h34'03"7'34"2'34"12'11"4'09"
5'10"8'19"3h47'51"5h45'11"7'50"2'40"12'36"4'17"
5'20"8'35"3h55'12"5h56'19"8'05"2'45"13'00"4'25"
5'30"8'51"4h02'33"6h07'27"8'20"2'50"13'25"4'33"
5'40"9'07"4h09'54"6h18'35"8'35"2'55"13'49"4'42"
5'50"9'23"4h17'15"6h29'43"8'50"3'00"14'13"4'50"
6'00"9'39"4h24'36"6h40'52"9'05"3'05"14'38"4'58"
6'10"9'55"4h31'57"6h52'00"9'21"3'11"15'02"5'07"
6'20"10'12"4h39'18"7h03'08"9'36"3'16"15'26"5'15"
6'30"10'28"4h46'39"7h14'16"9'51"3'21"15'51"5'23"
6'40"10'44"4h54'00"7h25'24"10'06"3'26"16'15"5'31"
6'50"10'60"5h01'22"7h36'32"10'21"3'31"16'40"5'40"
7'00"11'16"5h08'43"7h47'40"10'36"3'36"17'04"5'48"
7'10"11'32"5h16'04"7h58'48"10'51"3'41"17'28"5'56"
7'20"11'48"5h23'25"8h09'56"11'07"3'47"17'53"6'05"
7'30"12'04"5h30'46"8h21'05"11'22"3'52"18'17"6'13"
7'40"12'20"5h38'07"8h32'13"11'37"3'57"18'41"6'21"
7'50"12'36"5h45'28"8h43'21"11'52"4'02"19'06"6'29"
8'00"12'52"5h52'49"8h54'29"12'07"4'07"19'30"6'38"

Notes on the calculation of the length of the route, on the altimetry and on the slope

Note 1: the length of the route is calculated using the geographic coordinates of the points that compose it, thanks to a specific formula. This value may differ slightly from the official length declared by the organizers of the race, which is valid in case of discrepancies.
Note 2: the altimetry may not correspond exactly to the real values. For routes obtained via Google API, it is possible that the altitude is that of the terrain, without considering the presence of any tunnels or viaducts. If, however, the route was obtained from GPS tracking (for example with sports watches), the error is arbitrary and may depend both on the GPS coverage at the time it was recorded and on the performance of the device used.
Note 3: the percentage slope is found by calculating considering sections of at least 50 meters and is subsequently subjected to a "smoothing" process to reduce the possibility of artifacts and obtain a more realistic trend. For classification purposes, roads with gradients between -3% and +3% are considered flat, those with gradients between +3% and +7% are uphill, and those with gradients greater than +7% are considered steep. The same classification applies to descents. This classification is to be considered arbitrary and is a choice of goandrace.com.