2023 TCS London Marathon | Course | Altimetry
2023 TCS London Marathon: route, altitude, uphill/downhill statistics, gpx file
Note: "2023 TCS London Marathon" is NOT organized by goandrace.com
2023 TCS London Marathon course map. Lenght: 42.195 km (26.2 mi).
42.195 km (26.2 mi) course map of the event "2023 TCS London Marathon" in London (Sunday, April 23, 2023). Explore the route!
Do you want to fly over the path with a Google Earth 3D video? Click on the following link: 2023 TCS London Marathon, 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 2023 TCS London Marathon event page.
2023 TCS London Marathon: route altimetric information
2023 TCS London Marathon: GNR-GAP index (v 1.0, experimental, see more)
2023 TCS London Marathon: interactive route
You can set the km (or mile) markers and you can select different types of layers (Satellite or Openstreetmap).
2023 TCS London Marathon: altimetry graph
2023 TCS London Marathon: slope graph
2023 TCS London Marathon: percentage distribution of slope
2023 TCS London Marathon: 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 | 43 | 39 | -4 | -0.4% | 39 | 43 | 1 | 4 |
| KM 1-2 | 39 | 47 | +8 | +0.8% | 41 | 44 | 8 | 0 |
| KM 2-3 | 47 | 42 | -5 | -0.5% | 41 | 47 | 0 | 5 |
| KM 3-4 | 42 | 25 | -17 | -1.7% | 30 | 43 | 1 | 18 |
| KM 4-5 | 25 | 22 | -3 | -0.3% | 23 | 37 | 12 | 15 |
| KM 5-6 | 22 | 12 | -10 | -1.0% | 9 | 19 | 2 | 12 |
| KM 6-7 | 12 | 4 | -7 | -0.7% | 5 | 11 | 3 | 10 |
| KM 7-8 | 4 | 4 | 0 | 0% | 3 | 4 | 3 | 4 |
| KM 8-9 | 4 | 7 | +3 | +0.3% | 3 | 7 | 3 | 1 |
| KM 9-10 | 7 | 6 | -1 | -0.1% | 6 | 7 | 0 | 1 |
| KM 10-11 | 6 | 3 | -3 | -0.3% | 3 | 6 | 1 | 3 |
| KM 11-12 | 3 | 4 | 0 | 0% | 4 | 8 | 2 | 2 |
| KM 12-13 | 4 | 6 | +3 | +0.3% | 1 | 8 | 4 | 2 |
| KM 13-14 | 6 | 5 | -1 | -0.1% | 3 | 6 | 3 | 5 |
| KM 14-15 | 5 | 3 | -2 | -0.2% | -0 | 6 | 2 | 4 |
| KM 15-16 | 3 | 0 | -3 | -0.3% | 0 | 5 | 1 | 4 |
| KM 16-17 | 0 | 10 | +10 | +1.0% | 0 | 11 | 12 | 3 |
| KM 17-18 | 10 | 9 | -1 | -0.1% | 9 | 12 | 3 | 3 |
| KM 18-19 | 9 | 10 | +1 | +0.1% | 10 | 10 | 1 | 0 |
| KM 19-20 | 10 | 8 | -2 | -0.2% | 8 | 10 | 0 | 2 |
| KM 20-21 | 8 | 4 | -4 | -0.4% | 3 | 7 | 2 | 6 |
| KM 21-22 | 4 | 3 | -1 | -0.1% | 3 | 10 | 4 | 5 |
| KM 22-23 | 3 | 3 | 0 | 0% | 1 | 5 | 3 | 3 |
| KM 23-24 | 3 | 4 | +1 | +0.1% | 1 | 7 | 7 | 6 |
| KM 24-25 | 4 | 6 | +2 | +0.2% | 5 | 6 | 3 | 1 |
| KM 25-26 | 6 | 18 | +11 | +1.1% | 4 | 18 | 15 | 3 |
| KM 26-27 | 18 | 4 | -13 | -1.3% | 4 | 19 | 0 | 14 |
| KM 27-28 | 4 | 6 | +2 | +0.2% | 3 | 6 | 5 | 3 |
| KM 28-29 | 6 | 10 | +4 | +0.4% | 6 | 9 | 4 | 0 |
| KM 29-30 | 10 | 17 | +7 | +0.7% | 7 | 17 | 9 | 2 |
| KM 30-31 | 17 | 17 | 0 | 0% | 9 | 27 | 20 | 19 |
| KM 31-32 | 17 | 0 | -17 | -1.7% | 0 | 17 | 0 | 17 |
| KM 32-33 | 0 | 2 | +2 | +0.2% | 0 | 2 | 2 | 0 |
| KM 33-34 | 2 | 0 | -2 | -0.2% | 0 | 1 | 0 | 2 |
| KM 34-35 | 0 | 4 | +4 | +0.4% | 0 | 5 | 5 | 1 |
| KM 35-36 | 4 | 4 | 0 | 0% | 4 | 4 | 0 | 0 |
| KM 36-37 | 4 | 6 | +2 | +0.2% | 5 | 7 | 2 | 0 |
| KM 37-38 | 6 | 6 | 0 | 0% | 6 | 6 | 0 | 0 |
| KM 38-39 | 6 | 5 | -1 | -0.1% | 5 | 6 | 0 | 1 |
| KM 39-40 | 5 | 5 | 0 | 0% | 6 | 6 | 1 | 0 |
| KM 40-41 | 5 | 5 | 0 | 0% | 4 | 5 | 2 | 2 |
| KM 41-42 | 5 | 6 | +1 | +0.1% | 6 | 6 | 1 | 0 |
| KM 42-42.20 | 6 | 6 | 0 | 0% | 6 | 6 | 0 | 0 |
GNR-GAP index - Go&Race Algorithm Estimate
HEADS UP! Negligible elevation changes. Consider this a flat course.
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.