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BOSTON MARATHON 2023

Elizabeth Swierzbinski

Bib: 4434•F

DE

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 18%
Gender (Female)
#0 / 11423
Top 3%
Division (F18-39)
#0 / 4884
Top 6%
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
6:58/mi
21:40
↑ 97↓ 3451.5%
10K· 6.21 mi
6:37/mi
42:13
↑ 79↓ 1380.4%
15K· 9.32 mi
6:39/mi
1:02:53
↑ 67↓ 78
20K· 12.43 mi
6:43/mi
1:23:45
↑ 106↓ 860.1%
Half· 13.11 mi
6:39/mi
1:28:17
↑ 19↓ 370.5%
25K· 15.53 mi
6:47/mi
1:44:43
↑ 66↓ 880.2%
30K· 18.64 mi
7:01/mi
2:06:31
↑ 181↓ 1480.2%
20M
7:11/mi
2:16:17
↑ 64↓ 500.2%
21M
7:51/mi
2:24:08
↑ 106↓ 241.6%
35K· 21.75 mi
6:58/mi
2:29:21
↑ 17↓ 861.7%
23M
7:17/mi
2:38:28
↑ 23↓ 630.6%
24M
7:12/mi
2:45:40
↓ 821.3%
40K· 24.85 mi
7:26/mi
2:52:01
↓ 200.3%
25.2M
7:56/mi
2:54:45
↑ 13↓ 160.2%
Finish· 26.22 mi
7:25/mi
3:02:18
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:17
Pace6:44 /mi
2nd Half
Distance13.11 mi
Time1:34:01
Pace7:10 /mi
📊Positive Split: 6.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:2921:406:5821:40
6:58
-
10K
6.21 mi10:44:0242:136:4820:33
6:37
-0:21
15K
9.32 mi11:04:421:02:536:4520:40
6:39
+0:02
20K
12.43 mi11:25:341:23:456:4420:52
6:43
+0:04
Half
13.11 mi11:30:061:28:176:444:32
6:39
-0:04
25K
15.53 mi11:46:321:44:436:4416:26
6:47
+0:08
30K
18.64 mi12:08:202:06:316:4721:48
7:01
+0:14
20M
20.00 mi12:18:062:16:176:499:46
7:11
+0:10
21M
21.00 mi12:25:572:24:086:527:51
7:51
+0:40
35K
21.75 mi12:31:102:29:216:525:13
6:58
-0:53
23M
23.00 mi12:40:172:38:286:539:07
7:17
+0:19
24M
24.00 mi12:47:292:45:406:547:12
7:12
-0:05
40K
24.85 mi12:53:502:52:016:556:21
7:26
+0:14
25.2M
25.20 mi12:56:342:54:456:562:44
7:56
+0:30
Finish
26.22 mi13:04:073:02:186:577:33
7:25
-0:31

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

6:37 /mi

Average Pace

6:57 /mi

Slowest Pace

7:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:28:42

82% of race

Time at Steady Pace

23:01

13% of race

Time at Slower Pace

10:35

6% of race

Average Pace: 6:57 /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 mi10:23:2921:406:5821:40
6:58
#6111
10K
6.21 mi10:44:0242:136:4820:33
6:37
#4927
15K
9.32 mi11:04:421:02:536:4520:40
6:39
#4480
20K
12.43 mi11:25:341:23:456:4420:52
6:43
#4251
Half
13.11 mi11:30:061:28:176:444:32
6:39
#4220
25K
15.53 mi11:46:321:44:436:4416:26
6:47
#4140
30K
18.64 mi12:08:202:06:316:4721:48
7:01
#4190
20M
20.00 mi12:18:062:16:176:499:46
7:11
#4276
21M
21.00 mi12:25:572:24:086:527:51
7:51
#4441
35K
21.75 mi12:31:102:29:216:525:13
6:58
#4470
23M
23.00 mi12:40:172:38:286:539:07
7:17
#4521
24M
24.00 mi12:47:292:45:406:547:12
7:12
#4573
40K
24.85 mi12:53:502:52:016:556:21
7:26
#4608
25.2M
25.20 mi12:56:342:54:456:562:44
7:56
#4621
Finish
26.22 mi13:04:073:02:186:577:33
7:25
#4686
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi61115225223716(Top 14%)211(Top 2%)211(Top 4%)
10K6.21 mi3.10 mi4927+1184349+173349+1733617(Top 14%)200(Top 2%)200(Top 4%)
15K9.32 mi3.11 mi4480+447289+60289+603716(Top 14%)211(Top 2%)211(Top 4%)
20K12.43 mi3.11 mi4251+229261+28261+283714(Top 14%)202(Top 2%)202(Top 4%)
Half13.11 mi0.68 mi4220+31260+1260+13926(Top 15%)238(Top 2%)238(Top 5%)
25K15.53 mi2.42 mi4140+80254+6254+63975(Top 15%)243(Top 2%)243(Top 5%)
30K18.64 mi3.11 mi4190-50253+1253+14478(Top 17%)324(Top 3%)324(Top 7%)
20M20.00 mi1.36 mi4276-86267-14267-145063(Top 19%)465(Top 4%)465(Top 10%)
21M21.00 mi1.00 mi4441-165292-25292-256460(Top 24%)924(Top 8%)924(Top 19%)
35K21.75 mi0.75 mi4470-29299-7299-75226(Top 20%)547(Top 5%)547(Top 11%)
23M23.00 mi1.25 mi4521-51307-8307-85231(Top 20%)590(Top 5%)590(Top 12%)
24M24.00 mi1.00 mi4573-52311-4311-45763(Top 22%)804(Top 7%)804(Top 16%)
40K24.85 mi0.85 mi4608-35321-10321-106267(Top 24%)1063(Top 9%)1063(Top 22%)
25.2M25.20 mi0.35 mi4621-13325-4325-46119(Top 23%)1069(Top 9%)1069(Top 22%)
Finish26.22 mi1.02 mi4686-65350-25350-257859(Top 30%)1758(Top 15%)1758(Top 36%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21story building
+97ft-345ft

Overall

3716

Females

211

F18-39

211

5K→10K

3.1 - 6.2 mi

Top 14%
×5story building
+79ft-138ft

Overall

3617

Females

200

F18-39

200

10K→15K

6.2 - 9.3 mi

Top 14%
×3story building
+67ft-78ft

Overall

3716

Females

211

F18-39

211

15K→20K

9.3 - 12.4 mi

Top 14%
×5story building
+106ft-86ft

Overall

3714

Females

202

F18-39

202

20K→Half

12.4 - 13.1 mi

Top 15%
×2story building
+19ft-37ft

Overall

3926

Females

238

F18-39

238

Half→25K

13.1 - 15.5 mi

Top 15%
×4story building
+66ft-88ft

Overall

3975

Females

243

F18-39

243

25K→30K

15.5 - 18.6 mi

Top 17%
×9story building
+181ft-148ft

Overall

4478

Females

324

F18-39

324

30K→20M

18.6 - 20.0 mi

Top 19%
×5story building
+64ft-50ft

Overall

5063

Females

465

F18-39

465

20M→21M

20.0 - 21.0 mi

Top 24%
×8story building
+106ft-24ft

Overall

6460

Females

924

F18-39

924

21M→35K

21.0 - 21.8 mi

Top 20%
×7story building
+17ft-86ft

Overall

5226

Females

547

F18-39

547

35K→23M

21.8 - 23.0 mi

Top 20%
×5story building
+23ft-63ft

Overall

5231

Females

590

F18-39

590

23M→24M

23.0 - 24.0 mi

Top 22%
×6story building
+12ft-82ft

Overall

5763

Females

804

F18-39

804

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6267

Females

1063

F18-39

1063

40K→25.2M

24.9 - 25.2 mi

Top 23%
×1story
+13ft-16ft

Overall

6119

Females

1069

F18-39

1069

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2story building
+22ft-21ft

Overall

7859

Females

1758

F18-39

1758

Passing Analysis

Category:
Athletes Passed
2411
Passed By
986
Net Change
+1425
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6111
5K → 10K11906+1184#6111#4927
10K → 15K4558+447#4927#4480
15K → 20K24920+229#4480#4251
20K → Half398+31#4251#4220
Half → 25K11636+80#4220#4140
25K → 30K97147-50#4140#4190
30K → 20M42128-86#4190#4276
20M → 21M25190-165#4276#4441
21M → 35K3867-29#4441#4470
35K → 23M53104-51#4470#4521
23M → 24M2981-52#4521#4573
24M → 40K3772-35#4573#4608
40K → 25.2M1225-13#4608#4621
25.2M → Finish2994-65#4621#4686
TOTALS2411986+1425
📊

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