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Dunstable Downs Half 2024, course map and altimetry

Dunstable Downs Half 2024: route, altimetry, gpx

Note: "Dunstable Downs Half 2024" is NOT organized by goandrace.com

Dunstable Downs Half 2024 course map. Lenght: 21.098 km (13.1 mi).

21.098 km (13.1 mi) course map of the event "Dunstable Downs Half 2024" in Dunstable Downs (Sunday, July 14, 2024). Explore the route!

Do you want to fly over the path with a Google Earth 3D video? Click on the following link: Dunstable Downs Half 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 Dunstable Downs Half 2024 event page.

Dunstable Downs Half 2024: route altimetric information


Dunstable Downs Half 2024: GNR-GAP index (v 1.0, experimental, see more)

Dunstable Downs Half 2024: interactive route

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

Dunstable Downs Half 2024: altimetry graph

Dunstable Downs Half 2024: slope graph

Dunstable Downs Half 2024: percentage distribution of slope

Dunstable Downs Half 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 0-1 237 230 -6 -0.6% 231 239 2 8
KM 1-2 230 217 -13 -1.3% 217 229 0 13
KM 2-3 217 229 +12 +1.2% 217 229 12 0
KM 3-4 229 230 0 0% 230 238 8 8
KM 4-5 230 174 -56 -5.6% 175 229 0 56
KM 5-6 174 173 0 0% 170 199 25 26
KM 6-7 173 224 +51 +5.1% 173 232 56 5
KM 7-8 224 224 0 0% 222 227 5 5
KM 8-9 224 193 -31 -3.1% 194 223 0 31
KM 9-10 193 204 +10 +1.0% 193 207 13 3
KM 10-11 204 207 +4 +0.4% 202 207 5 1
KM 11-12 207 213 +6 +0.6% 206 213 6 1
KM 12-13 213 229 +16 +1.6% 214 228 16 0
KM 13-14 229 214 -15 -1.5% 214 233 3 18
KM 14-15 214 189 -25 -2.5% 182 216 9 34
KM 15-16 189 212 +23 +2.3% 192 216 27 4
KM 16-17 212 185 -28 -2.8% 170 217 17 45
KM 17-18 185 186 +1 +0.1% 172 198 25 24
KM 18-19 186 220 +35 +3.5% 187 228 41 7
KM 19-20 220 228 +8 +0.8% 217 227 11 3
KM 20-21 228 237 +9 +0.9% 229 238 10 1
KM 21-21.23 237 235 -2 -0.2% 235 237 0 3

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 5.5% slower.


For example, a runner who maintains a pace of 5'00"/km (8'03"/mi) on a flat 21.2 km course, corresponding to a finish time of 1h46'08", is estimated to complete this course in 1h51'57". The recalculated average pace (GAP) improves to 5'16"/km (8'29"/mi), making it 0'16"/km (0'26"/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 1h39'03", the estimate is to complete this course in 1h44'29", corresponding to a pace of 4'55"/km (or 7'55"/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 1h40'46" (pace of 4'45"/km or 7'38"/mi) corresponds to a time of 1h35'31" 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"1h03'41"1h07'10"3'10"0'10"5'06"0'16"
3'10"5'06"1h07'13"1h10'54"3'20"0'10"5'23"0'17"
3'20"5'22"1h10'45"1h14'38"3'31"0'11"5'40"0'18"
3'30"5'38"1h14'17"1h18'22"3'42"0'12"5'57"0'19"
3'40"5'54"1h17'50"1h22'06"3'52"0'12"6'13"0'19"
3'50"6'10"1h21'22"1h25'50"4'03"0'13"6'30"0'20"
4'00"6'26"1h24'54"1h29'34"4'13"0'13"6'47"0'21"
4'10"6'42"1h28'27"1h33'18"4'24"0'14"7'04"0'22"
4'20"6'58"1h31'59"1h37'02"4'34"0'14"7'21"0'23"
4'30"7'15"1h35'31"1h40'46"4'45"0'15"7'38"0'24"
4'40"7'31"1h39'03"1h44'30"4'55"0'15"7'55"0'25"
4'50"7'47"1h42'36"1h48'14"5'06"0'16"8'12"0'26"
5'00"8'03"1h46'08"1h51'57"5'16"0'16"8'29"0'26"
5'10"8'19"1h49'40"1h55'41"5'27"0'17"8'46"0'27"
5'20"8'35"1h53'12"1h59'25"5'38"0'18"9'03"0'28"
5'30"8'51"1h56'45"2h03'09"5'48"0'18"9'20"0'29"
5'40"9'07"2h00'17"2h06'53"5'59"0'19"9'37"0'30"
5'50"9'23"2h03'49"2h10'37"6'09"0'19"9'54"0'31"
6'00"9'39"2h07'22"2h14'21"6'20"0'20"10'11"0'32"
6'10"9'55"2h10'54"2h18'05"6'30"0'20"10'28"0'33"
6'20"10'12"2h14'26"2h21'49"6'41"0'21"10'45"0'34"
6'30"10'28"2h17'58"2h25'33"6'51"0'21"11'02"0'34"
6'40"10'44"2h21'31"2h29'17"7'02"0'22"11'19"0'35"
6'50"10'60"2h25'03"2h33'01"7'13"0'23"11'36"0'36"
7'00"11'16"2h28'35"2h36'45"7'23"0'23"11'53"0'37"
7'10"11'32"2h32'08"2h40'29"7'34"0'24"12'10"0'38"
7'20"11'48"2h35'40"2h44'12"7'44"0'24"12'27"0'39"
7'30"12'04"2h39'12"2h47'56"7'55"0'25"12'44"0'40"
7'40"12'20"2h42'44"2h51'40"8'05"0'25"13'01"0'41"
7'50"12'36"2h46'17"2h55'24"8'16"0'26"13'18"0'42"
8'00"12'52"2h49'49"2h59'08"8'26"0'26"13'35"0'42"

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.