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BOSTON MARATHON 2023

Susan Day

Bib: 19547•F

OH

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 46%
Gender (Female)
#0 / 11423
Top 28%
Masters (Masters Women)
#0 / 6539
Top 15%
Division (F50-54)
#0 / 1207
Top 8%
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
8:13/mi
25:31
↑ 97↓ 3451.5%
10K· 6.21 mi
8:08/mi
50:46
↑ 79↓ 1380.4%
15K· 9.32 mi
8:10/mi
1:16:07
↑ 67↓ 78
20K· 12.43 mi
8:06/mi
1:41:17
↑ 106↓ 860.1%
Half· 13.11 mi
7:55/mi
1:46:41
↑ 19↓ 370.5%
25K· 15.53 mi
8:03/mi
2:06:13
↑ 66↓ 880.2%
30K· 18.64 mi
8:09/mi
2:31:31
↑ 181↓ 1480.2%
20M
7:56/mi
2:42:18
↑ 64↓ 500.2%
21M
8:21/mi
2:50:39
↑ 106↓ 241.6%
35K· 21.75 mi
7:28/mi
2:56:14
↑ 17↓ 861.7%
23M
7:39/mi
3:05:49
↑ 23↓ 630.6%
24M
7:23/mi
3:13:12
↓ 821.3%
40K· 24.85 mi
7:28/mi
3:19:35
↓ 200.3%
25.2M
8:04/mi
3:22:22
↑ 13↓ 160.2%
Finish· 26.22 mi
7:12/mi
3:29:42
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:46:41
Pace8:08 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:43:01
Pace7:52 /mi
📊Negative Split: 3.4% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:4125:318:1325:31
8:13
-
10K
6.21 mi11:46:5650:468:1025:15
8:08
-0:05
15K
9.32 mi12:12:171:16:078:1025:21
8:10
+0:02
20K
12.43 mi12:37:271:41:178:0925:10
8:06
-0:04
Half
13.11 mi12:42:511:46:418:085:24
7:55
-0:11
25K
15.53 mi13:02:232:06:138:0819:32
8:03
+0:08
30K
18.64 mi13:27:412:31:318:0825:18
8:09
+0:06
20M
20.00 mi13:38:282:42:188:0710:47
7:56
-0:13
21M
21.00 mi13:46:492:50:398:088:21
8:21
+0:25
35K
21.75 mi13:52:242:56:148:065:35
7:28
-0:53
23M
23.00 mi14:01:593:05:498:059:35
7:39
+0:11
24M
24.00 mi14:09:223:13:128:037:23
7:23
-0:16
40K
24.85 mi14:15:453:19:358:026:23
7:28
+0:05
25.2M
25.20 mi14:18:323:22:228:022:47
8:04
+0:36
Finish
26.22 mi14:25:523:29:428:007:20
7:12
-0:52

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

7:12 /mi

Average Pace

8:00 /mi

Slowest Pace

8:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

41:40

20% of race

Time at Steady Pace

2:48:02

80% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:00 /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 mi11:21:4125:318:1325:31
8:13
#15556
10K
6.21 mi11:46:5650:468:1025:15
8:08
#15620
15K
9.32 mi12:12:171:16:078:1025:21
8:10
#15593
20K
12.43 mi12:37:271:41:178:0925:10
8:06
#15251
Half
13.11 mi12:42:511:46:418:085:24
7:55
#15159
25K
15.53 mi13:02:232:06:138:0819:32
8:03
#14817
30K
18.64 mi13:27:412:31:318:0825:18
8:09
#14317
20M
20.00 mi13:38:282:42:188:0710:47
7:56
#13951
21M
21.00 mi13:46:492:50:398:088:21
8:21
#13660
35K
21.75 mi13:52:242:56:148:065:35
7:28
#13437
23M
23.00 mi14:01:593:05:498:059:35
7:39
#13040
24M
24.00 mi14:09:223:13:128:037:23
7:23
#12762
40K
24.85 mi14:15:453:19:358:026:23
7:28
#12519
25.2M
25.20 mi14:18:323:22:228:022:47
8:04
#12423
Finish
26.22 mi14:25:523:29:428:007:20
7:12
#12165
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi155565001500115572(Top 58%)5021(Top 44%)5021(Top 416%)
10K6.21 mi3.10 mi15620-645044-435044-4315720(Top 59%)5087(Top 45%)5087(Top 421%)
15K9.32 mi3.11 mi15593+275033+115033+1115572(Top 58%)5021(Top 44%)5021(Top 416%)
20K12.43 mi3.11 mi15251+3424839+1944839+19414230(Top 53%)4242(Top 37%)4242(Top 351%)
Half13.11 mi0.68 mi15159+924778+614778+6113709(Top 51%)3896(Top 34%)3896(Top 323%)
25K15.53 mi2.42 mi14817+3424596+1824596+18213198(Top 50%)3741(Top 33%)3741(Top 310%)
30K18.64 mi3.11 mi14317+5004338+2584338+25811954(Top 45%)3160(Top 28%)3160(Top 262%)
20M20.00 mi1.36 mi13951+3664130+2084130+2089831(Top 37%)2173(Top 19%)2173(Top 180%)
21M21.00 mi1.00 mi13660+2913969+1613969+1619574(Top 36%)2188(Top 19%)2188(Top 181%)
35K21.75 mi0.75 mi13437+2233850+1193850+1198351(Top 31%)1653(Top 14%)1653(Top 137%)
23M23.00 mi1.25 mi13040+3973647+2033647+2037497(Top 28%)1384(Top 12%)1384(Top 115%)
24M24.00 mi1.00 mi12762+2783510+1373510+1376995(Top 26%)1290(Top 11%)1290(Top 107%)
40K24.85 mi0.85 mi12519+2433385+1253385+1256570(Top 25%)1206(Top 11%)1206(Top 100%)
25.2M25.20 mi0.35 mi12423+963339+463339+467038(Top 26%)1461(Top 13%)1461(Top 121%)
Finish26.22 mi1.02 mi12165+2583215+1243215+1246457(Top 24%)1235(Top 11%)1235(Top 102%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×21story building
+97ft-345ft

Overall

15572

Females

5021

F50-54

5021

5K→10K

3.1 - 6.2 mi

Top 59%
×5story building
+79ft-138ft

Overall

15720

Females

5087

F50-54

5087

10K→15K

6.2 - 9.3 mi

Top 58%
×3story building
+67ft-78ft

Overall

15572

Females

5021

F50-54

5021

15K→20K

9.3 - 12.4 mi

Top 53%
×5story building
+106ft-86ft

Overall

14230

Females

4242

F50-54

4242

20K→Half

12.4 - 13.1 mi

Top 51%
×2story building
+19ft-37ft

Overall

13709

Females

3896

F50-54

3896

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

13198

Females

3741

F50-54

3741

25K→30K

15.5 - 18.6 mi

Top 45%
×9story building
+181ft-148ft

Overall

11954

Females

3160

F50-54

3160

30K→20M

18.6 - 20.0 mi

Top 37%
×5story building
+64ft-50ft

Overall

9831

Females

2173

F50-54

2173

20M→21M

20.0 - 21.0 mi

Top 36%
×8story building
+106ft-24ft

Overall

9574

Females

2188

F50-54

2188

21M→35K

21.0 - 21.8 mi

Top 31%
×7story building
+17ft-86ft

Overall

8351

Females

1653

F50-54

1653

35K→23M

21.8 - 23.0 mi

Top 28%
×5story building
+23ft-63ft

Overall

7497

Females

1384

F50-54

1384

23M→24M

23.0 - 24.0 mi

Top 26%
×6story building
+12ft-82ft

Overall

6995

Females

1290

F50-54

1290

24M→40K

24.0 - 24.9 mi

Top 25%
×1story
+6ft-20ft

Overall

6570

Females

1206

F50-54

1206

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

7038

Females

1461

F50-54

1461

25.2M→Finish

25.2 - 26.2 mi

Top 24%
×2story building
+22ft-21ft

Overall

6457

Females

1235

F50-54

1235

Passing Analysis

Category:
Athletes Passed
3979
Passed By
588
Net Change
+3391
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15556
5K → 10K270334-64#15556#15620
10K → 15K195168+27#15620#15593
15K → 20K38240+342#15593#15251
20K → Half997+92#15251#15159
Half → 25K35311+342#15159#14817
25K → 30K5099+500#14817#14317
30K → 20M3671+366#14317#13951
20M → 21M2965+291#13951#13660
21M → 35K2230+223#13660#13437
35K → 23M3981+397#13437#13040
23M → 24M2802+278#13040#12762
24M → 40K2452+243#12762#12519
40K → 25.2M971+96#12519#12423
25.2M → Finish2657+258#12423#12165
TOTALS3979588+3391
📊

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