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Huntersville Half Marathon 2021 | Course | Altimetry

Huntersville Half Marathon 2021: route, altitude, uphill/downhill statistics, gpx file

Note: "Huntersville Half Marathon 2021" is NOT organized by goandrace.com

Huntersville Half Marathon 2021 course map. Lenght: 21.098 km (13.1 mi).

21.098 km (13.1 mi) course map of the event "Huntersville Half Marathon 2021" in Huntersville, North Carolina (Saturday, December 11, 2021). Explore the route!

Do you want to fly over the path with a Google Earth 3D video? Click on the following link: Huntersville Half Marathon 2021, 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 Huntersville Half Marathon 2021 event page.

Huntersville Half Marathon 2021: route altimetric information


Huntersville Half Marathon 2021: GNR-GAP index (v 1.0, experimental, see more)

Huntersville Half Marathon 2021: interactive route

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

Huntersville Half Marathon 2021: altimetry graph

Huntersville Half Marathon 2021: slope graph

Huntersville Half Marathon 2021: percentage distribution of slope

Huntersville Half Marathon 2021: Km by km route altimetry analysis

Lap Start Alt. End Alt. Diff. Alt. Aver. Slope Min Alt. Max Alt. Tot Climb Tot Descent
KM 0-1 220 213 -7 -0.7% 213 223 1 8
KM 1-2 213 230 +17 +1.7% 214 229 17 0
KM 2-3 230 232 +2 +0.2% 231 238 8 5
KM 3-4 232 224 -8 -0.8% 224 233 1 9
KM 4-5 224 234 +11 +1.1% 215 234 19 8
KM 5-6 234 226 -8 -0.8% 227 235 1 9
KM 6-7 226 216 -11 -1.1% 212 229 6 17
KM 7-8 216 222 +7 +0.7% 217 227 11 4
KM 8-9 222 209 -13 -1.3% 210 224 2 15
KM 9-10 209 209 0 0% 207 219 7 7
KM 10-11 209 224 +14 +1.4% 207 225 17 2
KM 11-12 224 226 +3 +0.3% 223 232 8 6
KM 12-13 226 232 +6 +0.6% 215 232 21 15
KM 13-14 232 213 -19 -1.9% 211 234 3 22
KM 14-15 213 234 +21 +2.1% 214 234 21 0
KM 15-16 234 218 -16 -1.6% 220 237 3 19
KM 16-17 218 211 -7 -0.7% 209 217 2 9
KM 17-18 211 218 +8 +0.8% 210 218 9 1
KM 18-19 218 231 +13 +1.3% 218 231 14 1
KM 19-20 231 226 -6 -0.6% 226 236 5 10
KM 20-21 226 218 -7 -0.7% 215 225 3 10
KM 21-21.10 218 218 -1 -0.1% 218 218 0 1

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 2.3% slower.


For example, a runner who maintains a pace of 5'00"/km (8'03"/mi) on a flat 20.6 km course, corresponding to a finish time of 1h42'49", is estimated to complete this course in 1h45'10". The recalculated average pace (GAP) improves to 5'07"/km (8'14"/mi), making it 0'07"/km (0'11"/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 8'/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 1h35'58", the estimate is to complete this course in 1h38'10", corresponding to a pace of 4'46"/km (or 7'41"/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 1h34'39" (pace of 4'36"/km or 7'24"/mi) corresponds to a time of 1h32'32" 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"1h01'41"1h03'06"3'04"0'04"4'56"0'07"
3'05"4'58"1h03'24"1h04'51"3'09"0'04"5'05"0'07"
3'10"5'06"1h05'07"1h06'36"3'14"0'04"5'13"0'07"
3'15"5'14"1h06'50"1h08'22"3'19"0'04"5'21"0'07"
3'20"5'22"1h08'33"1h10'07"3'25"0'05"5'29"0'07"
3'25"5'30"1h10'15"1h11'52"3'30"0'05"5'37"0'08"
3'30"5'38"1h11'58"1h13'37"3'35"0'05"5'46"0'08"
3'35"5'46"1h13'41"1h15'22"3'40"0'05"5'54"0'08"
3'40"5'54"1h15'24"1h17'08"3'45"0'05"6'02"0'08"
3'45"6'02"1h17'07"1h18'53"3'50"0'05"6'10"0'08"
3'50"6'10"1h18'50"1h20'38"3'55"0'05"6'19"0'08"
3'55"6'18"1h20'32"1h22'23"4'00"0'05"6'27"0'09"
4'00"6'26"1h22'15"1h24'08"4'05"0'05"6'35"0'09"
4'05"6'34"1h23'58"1h25'53"4'11"0'06"6'43"0'09"
4'10"6'42"1h25'41"1h27'39"4'16"0'06"6'52"0'09"
4'15"6'50"1h27'24"1h29'24"4'21"0'06"7'00"0'09"
4'20"6'58"1h29'07"1h31'09"4'26"0'06"7'08"0'10"
4'25"7'06"1h30'49"1h32'54"4'31"0'06"7'16"0'10"
4'30"7'15"1h32'32"1h34'39"4'36"0'06"7'24"0'10"
4'35"7'23"1h34'15"1h36'25"4'41"0'06"7'33"0'10"
4'40"7'31"1h35'58"1h38'10"4'46"0'06"7'41"0'10"
4'45"7'39"1h37'41"1h39'55"4'52"0'07"7'49"0'11"
4'50"7'47"1h39'24"1h41'40"4'57"0'07"7'57"0'11"
4'55"7'55"1h41'06"1h43'25"5'02"0'07"8'06"0'11"
5'00"8'03"1h42'49"1h45'10"5'07"0'07"8'14"0'11"
5'05"8'11"1h44'32"1h46'56"5'12"0'07"8'22"0'11"
5'10"8'19"1h46'15"1h48'41"5'17"0'07"8'30"0'11"
5'15"8'27"1h47'58"1h50'26"5'22"0'07"8'39"0'12"
5'20"8'35"1h49'41"1h52'11"5'27"0'07"8'47"0'12"
5'25"8'43"1h51'23"1h53'56"5'32"0'07"8'55"0'12"
5'30"8'51"1h53'06"1h55'42"5'38"0'08"9'03"0'12"
5'35"8'59"1h54'49"1h57'27"5'43"0'08"9'11"0'12"
5'40"9'07"1h56'32"1h59'12"5'48"0'08"9'20"0'13"
5'45"9'15"1h58'15"2h00'57"5'53"0'08"9'28"0'13"
5'50"9'23"1h59'57"2h02'42"5'58"0'08"9'36"0'13"
5'55"9'31"2h01'40"2h04'27"6'03"0'08"9'44"0'13"
6'00"9'39"2h03'23"2h06'13"6'08"0'08"9'53"0'13"
6'05"9'47"2h05'06"2h07'58"6'13"0'08"10'01"0'13"
6'10"9'55"2h06'49"2h09'43"6'18"0'08"10'09"0'14"
6'15"10'04"2h08'32"2h11'28"6'24"0'09"10'17"0'14"
6'20"10'12"2h10'14"2h13'13"6'29"0'09"10'26"0'14"
6'25"10'20"2h11'57"2h14'59"6'34"0'09"10'34"0'14"
6'30"10'28"2h13'40"2h16'44"6'39"0'09"10'42"0'14"
6'35"10'36"2h15'23"2h18'29"6'44"0'09"10'50"0'15"
6'40"10'44"2h17'06"2h20'14"6'49"0'09"10'58"0'15"
6'45"10'52"2h18'49"2h21'59"6'54"0'09"11'07"0'15"
6'50"11'00"2h20'31"2h23'44"6'59"0'09"11'15"0'15"
6'55"11'08"2h22'14"2h25'30"7'05"0'10"11'23"0'15"
7'00"11'16"2h23'57"2h27'15"7'10"0'10"11'31"0'15"
7'05"11'24"2h25'40"2h29'00"7'15"0'10"11'40"0'16"
7'10"11'32"2h27'23"2h30'45"7'20"0'10"11'48"0'16"
7'15"11'40"2h29'06"2h32'30"7'25"0'10"11'56"0'16"
7'20"11'48"2h30'48"2h34'16"7'30"0'10"12'04"0'16"
7'25"11'56"2h32'31"2h36'01"7'35"0'10"12'13"0'16"
7'30"12'04"2h34'14"2h37'46"7'40"0'10"12'21"0'17"
7'35"12'12"2h35'57"2h39'31"7'45"0'10"12'29"0'17"
7'40"12'20"2h37'40"2h41'16"7'51"0'11"12'37"0'17"
7'45"12'28"2h39'23"2h43'01"7'56"0'11"12'45"0'17"
7'50"12'36"2h41'05"2h44'47"8'01"0'11"12'54"0'17"
7'55"12'44"2h42'48"2h46'32"8'06"0'11"13'02"0'18"
8'00"12'52"2h44'31"2h48'17"8'11"0'11"13'10"0'18"

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.