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BOSTON MARATHON 2023

Emily Nourse

Bib: 17979•F

OR

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 46%
Gender (Female)
#0 / 11423
Top 29%
Division (F18-39)
#0 / 4884
Top 47%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:32/mi
23:25
↑ 97↓ 3451.5%
10K· 6.21 mi
7:20/mi
46:12
↑ 79↓ 1380.4%
15K· 9.32 mi
7:27/mi
1:09:20
↑ 67↓ 78
20K· 12.43 mi
7:35/mi
1:32:55
↑ 106↓ 860.1%
Half· 13.11 mi
7:33/mi
1:38:04
↑ 19↓ 370.5%
25K· 15.53 mi
7:51/mi
1:57:06
↑ 66↓ 880.2%
30K· 18.64 mi
8:16/mi
2:22:48
↑ 181↓ 1480.2%
20M
8:34/mi
2:34:26
↑ 64↓ 500.2%
21M
9:23/mi
2:43:49
↑ 106↓ 241.6%
35K· 21.75 mi
8:44/mi
2:50:21
↑ 17↓ 861.7%
23M
9:02/mi
3:01:40
↑ 23↓ 630.6%
24M
8:51/mi
3:10:31
↓ 821.3%
40K· 24.85 mi
8:58/mi
3:18:11
↓ 200.3%
25.2M
9:43/mi
3:21:32
↑ 13↓ 160.2%
Finish· 26.22 mi
8:35/mi
3:30:17
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:04
Pace7:29 /mi
2nd Half
Distance13.11 mi
Time1:52:13
Pace8:34 /mi
📊Positive Split: 14.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:13:5123:257:3223:25
7:32
-
10K
6.21 mi11:36:3846:127:2622:47
7:20
-0:12
15K
9.32 mi11:59:461:09:207:2623:08
7:27
+0:07
20K
12.43 mi12:23:211:32:557:2923:35
7:35
+0:08
Half
13.11 mi12:28:301:38:047:295:09
7:33
-0:02
25K
15.53 mi12:47:321:57:067:3219:02
7:51
+0:18
30K
18.64 mi13:13:142:22:487:4025:42
8:16
+0:25
20M
20.00 mi13:24:522:34:267:4311:38
8:34
+0:18
21M
21.00 mi13:34:152:43:497:489:23
9:23
+0:49
35K
21.75 mi13:40:472:50:217:506:32
8:44
-0:39
23M
23.00 mi13:52:063:01:407:5411:19
9:02
+0:18
24M
24.00 mi14:00:573:10:317:568:51
8:51
-0:11
40K
24.85 mi14:08:373:18:117:587:40
8:58
+0:07
25.2M
25.20 mi14:11:583:21:328:003:21
9:43
+0:45
Finish
26.22 mi14:20:433:30:178:028:45
8:35
-1:08

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:20 /mi

Average Pace

8:02 /mi

Slowest Pace

9:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:57:06

56% of race

Time at Steady Pace

1:01:28

29% of race

Time at Slower Pace

31:43

15% of race

Average Pace: 8:01 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:13:5123:257:3223:25
7:32
#9984
10K
6.21 mi11:36:3846:127:2622:47
7:20
#9468
15K
9.32 mi11:59:461:09:207:2623:08
7:27
#9522
20K
12.43 mi12:23:211:32:557:2923:35
7:35
#9626
Half
13.11 mi12:28:301:38:047:295:09
7:33
#9674
25K
15.53 mi12:47:321:57:067:3219:02
7:51
#9961
30K
18.64 mi13:13:142:22:487:4025:42
8:16
#10440
20M
20.00 mi13:24:522:34:267:4311:38
8:34
#10724
21M
21.00 mi13:34:152:43:497:489:23
9:23
#11015
35K
21.75 mi13:40:472:50:217:506:32
8:44
#11253
23M
23.00 mi13:52:063:01:407:5411:19
9:02
#11637
24M
24.00 mi14:00:573:10:317:568:51
8:51
#11902
40K
24.85 mi14:08:373:18:117:587:40
8:58
#12080
25.2M
25.20 mi14:11:583:21:328:003:21
9:43
#12145
Finish
26.22 mi14:20:433:30:178:028:45
8:35
#12353
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi9984185918599753(Top 37%)1734(Top 15%)1734(Top 36%)
10K6.21 mi3.10 mi9468+5161600+2591600+2599131(Top 34%)1474(Top 13%)1474(Top 30%)
15K9.32 mi3.11 mi9522-541628-281628-289753(Top 37%)1734(Top 15%)1734(Top 36%)
20K12.43 mi3.11 mi9626-1041675-471675-4710041(Top 38%)1938(Top 17%)1938(Top 40%)
Half13.11 mi0.68 mi9674-481695-201695-2010710(Top 40%)2248(Top 20%)2248(Top 46%)
25K15.53 mi2.42 mi9961-2871834-1391834-13911547(Top 43%)2802(Top 25%)2802(Top 57%)
30K18.64 mi3.11 mi10440-4792121-2872121-28712850(Top 48%)3664(Top 32%)3664(Top 75%)
20M20.00 mi1.36 mi10724-2842297-1762297-17614003(Top 53%)4403(Top 39%)4403(Top 90%)
21M21.00 mi1.00 mi11015-2912468-1712468-17115399(Top 58%)5276(Top 46%)5276(Top 108%)
35K21.75 mi0.75 mi11253-2382608-1402608-14016590(Top 62%)6030(Top 53%)6030(Top 123%)
23M23.00 mi1.25 mi11637-3842843-2352843-23516238(Top 61%)5865(Top 51%)5865(Top 120%)
24M24.00 mi1.00 mi11902-2653019-1763019-17616492(Top 62%)6068(Top 53%)6068(Top 124%)
40K24.85 mi0.85 mi12080-1783148-1293148-12915967(Top 60%)5825(Top 51%)5825(Top 119%)
25.2M25.20 mi0.35 mi12145-653185-373185-3716177(Top 61%)5944(Top 52%)5944(Top 122%)
Finish26.22 mi1.02 mi12353-2083322-1373322-13715914(Top 60%)5749(Top 50%)5749(Top 118%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21story building
+97ft-345ft

Overall

9753

Females

1734

F18-39

1734

5K→10K

3.1 - 6.2 mi

Top 34%
×5story building
+79ft-138ft

Overall

9131

Females

1474

F18-39

1474

10K→15K

6.2 - 9.3 mi

Top 37%
×3story building
+67ft-78ft

Overall

9753

Females

1734

F18-39

1734

15K→20K

9.3 - 12.4 mi

Top 38%
×5story building
+106ft-86ft

Overall

10041

Females

1938

F18-39

1938

20K→Half

12.4 - 13.1 mi

Top 40%
×2story building
+19ft-37ft

Overall

10710

Females

2248

F18-39

2248

Half→25K

13.1 - 15.5 mi

Top 43%
×4story building
+66ft-88ft

Overall

11547

Females

2802

F18-39

2802

25K→30K

15.5 - 18.6 mi

Top 48%
×9story building
+181ft-148ft

Overall

12850

Females

3664

F18-39

3664

30K→20M

18.6 - 20.0 mi

Top 53%
×5story building
+64ft-50ft

Overall

14003

Females

4403

F18-39

4403

20M→21M

20.0 - 21.0 mi

Top 58%
×8story building
+106ft-24ft

Overall

15399

Females

5276

F18-39

5276

21M→35K

21.0 - 21.8 mi

Top 62%
×7story building
+17ft-86ft

Overall

16590

Females

6030

F18-39

6030

35K→23M

21.8 - 23.0 mi

Top 61%
×5story building
+23ft-63ft

Overall

16238

Females

5865

F18-39

5865

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

16492

Females

6068

F18-39

6068

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

15967

Females

5825

F18-39

5825

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

16177

Females

5944

F18-39

5944

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2story building
+22ft-21ft

Overall

15914

Females

5749

F18-39

5749

Passing Analysis

Category:
Athletes Passed
1168*
Passed By
3535
Net Change
-2369
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9984
5K → 10K628112+516#9984#9468
10K → 15K141195-54#9468#9522
15K → 20K111215-104#9522#9626
20K → Half957-48#9626#9674
Half → 25K62348-287#9674#9961
25K → 30K63541-479#9961#10440
30K → 20M19*303-284#10440#10724
20M → 21M16307-291#10724#11015
21M → 35K10248-238#11015#11253
35K → 23M29413-384#11253#11637
23M → 24M17282-265#11637#11902
24M → 40K25203-178#11902#12080
40K → 25.2M1176-65#12080#12145
25.2M → Finish27235-208#12145#12353
TOTALS1168*3535-2369

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing