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BOSTON MARATHON 2023

Magdalena Byra

Bib: 17046•F

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 31%
Gender (Female)
#0 / 11423
Top 12%
Masters (Masters Women)
#0 / 6539
Top 4%
Division (F40-44)
#0 / 1878
Top 10%
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
7:39/mi
23:45
↑ 97↓ 3451.5%
10K· 6.21 mi
7:37/mi
47:24
↑ 79↓ 1380.4%
15K· 9.32 mi
7:34/mi
1:10:54
↑ 67↓ 78
20K· 12.43 mi
7:36/mi
1:34:31
↑ 106↓ 860.1%
Half· 13.11 mi
7:31/mi
1:39:39
↑ 19↓ 370.5%
25K· 15.53 mi
7:32/mi
1:57:54
↑ 66↓ 880.2%
30K· 18.64 mi
7:32/mi
2:21:19
↑ 181↓ 1480.2%
20M
7:30/mi
2:31:31
↑ 64↓ 500.2%
21M
8:09/mi
2:39:40
↑ 106↓ 241.6%
35K· 21.75 mi
7:18/mi
2:45:08
↑ 17↓ 861.7%
23M
7:22/mi
2:54:21
↑ 23↓ 630.6%
24M
6:58/mi
3:01:19
↓ 821.3%
40K· 24.85 mi
7:03/mi
3:07:21
↓ 200.3%
25.2M
7:50/mi
3:10:03
↑ 13↓ 160.2%
Finish· 26.22 mi
7:01/mi
3:17:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:39:39
Pace7:36 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:37:33
Pace7:26 /mi
📊Negative Split: 2.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:3523:457:3923:45
7:39
-
10K
6.21 mi11:38:1447:247:3823:39
7:37
-0:02
15K
9.32 mi12:01:441:10:547:3623:30
7:34
-0:03
20K
12.43 mi12:25:211:34:317:3623:37
7:36
+0:02
Half
13.11 mi12:30:291:39:397:365:08
7:31
-0:05
25K
15.53 mi12:48:441:57:547:3518:15
7:32
+0:01
30K
18.64 mi13:12:092:21:197:3523:25
7:32
0:00
20M
20.00 mi13:22:212:31:317:3510:12
7:30
-0:02
21M
21.00 mi13:30:302:39:407:368:09
8:09
+0:39
35K
21.75 mi13:35:582:45:087:365:28
7:18
-0:51
23M
23.00 mi13:45:112:54:217:359:13
7:22
+0:04
24M
24.00 mi13:52:093:01:197:336:58
6:58
-0:24
40K
24.85 mi13:58:113:07:217:326:02
7:03
+0:05
25.2M
25.20 mi14:00:533:10:037:332:42
7:50
+0:47
Finish
26.22 mi14:08:023:17:127:327:09
7:01
-0:49

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

6:58 /mi

Average Pace

7:32 /mi

Slowest Pace

8:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:06:21

94% of race

Time at Steady Pace

10:51

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:31 /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 mi11:14:3523:457:3923:45
7:39
#10970
10K
6.21 mi11:38:1447:247:3823:39
7:37
#11173
15K
9.32 mi12:01:441:10:547:3623:30
7:34
#10988
20K
12.43 mi12:25:211:34:317:3623:37
7:36
#10760
Half
13.11 mi12:30:291:39:397:365:08
7:31
#10733
25K
15.53 mi12:48:441:57:547:3518:15
7:32
#10396
30K
18.64 mi13:12:092:21:197:3523:25
7:32
#9833
20M
20.00 mi13:22:212:31:317:3510:12
7:30
#9574
21M
21.00 mi13:30:302:39:407:368:09
8:09
#9460
35K
21.75 mi13:35:582:45:087:365:28
7:18
#9340
23M
23.00 mi13:45:112:54:217:359:13
7:22
#9084
24M
24.00 mi13:52:093:01:197:336:58
6:58
#8817
40K
24.85 mi13:58:113:07:217:326:02
7:03
#8611
25.2M
25.20 mi14:00:533:10:037:332:42
7:50
#8548
Finish
26.22 mi14:08:023:17:127:327:09
7:01
#8364
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi109702307230710712(Top 40%)2181(Top 19%)2181(Top 116%)
10K6.21 mi3.10 mi11173-2032421-1142421-11411440(Top 43%)2568(Top 22%)2568(Top 137%)
15K9.32 mi3.11 mi10988+1852328+932328+9310712(Top 40%)2181(Top 19%)2181(Top 116%)
20K12.43 mi3.11 mi10760+2282223+1052223+10510106(Top 38%)1962(Top 17%)1962(Top 104%)
Half13.11 mi0.68 mi10733+272207+162207+1610425(Top 39%)2080(Top 18%)2080(Top 111%)
25K15.53 mi2.42 mi10396+3372039+1682039+1688984(Top 34%)1544(Top 14%)1544(Top 82%)
30K18.64 mi3.11 mi9833+5631814+2251814+2257490(Top 28%)1108(Top 10%)1108(Top 59%)
20M20.00 mi1.36 mi9574+2591739+751739+756854(Top 26%)979(Top 9%)979(Top 52%)
21M21.00 mi1.00 mi9460+1141718+211718+218323(Top 31%)1649(Top 14%)1649(Top 88%)
35K21.75 mi0.75 mi9340+1201688+301688+307229(Top 27%)1191(Top 10%)1191(Top 63%)
23M23.00 mi1.25 mi9084+2561604+841604+845677(Top 21%)715(Top 6%)715(Top 38%)
24M24.00 mi1.00 mi8817+2671524+801524+804548(Top 17%)459(Top 4%)459(Top 24%)
40K24.85 mi0.85 mi8611+2061453+711453+714188(Top 16%)456(Top 4%)456(Top 24%)
25.2M25.20 mi0.35 mi8548+631433+201433+205636(Top 21%)949(Top 8%)949(Top 51%)
Finish26.22 mi1.02 mi8364+1841395+381395+385352(Top 20%)851(Top 7%)851(Top 45%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21story building
+97ft-345ft

Overall

10712

Females

2181

F40-44

2181

5K→10K

3.1 - 6.2 mi

Top 43%
×5story building
+79ft-138ft

Overall

11440

Females

2568

F40-44

2568

10K→15K

6.2 - 9.3 mi

Top 40%
×3story building
+67ft-78ft

Overall

10712

Females

2181

F40-44

2181

15K→20K

9.3 - 12.4 mi

Top 38%
×5story building
+106ft-86ft

Overall

10106

Females

1962

F40-44

1962

20K→Half

12.4 - 13.1 mi

Top 39%
×2story building
+19ft-37ft

Overall

10425

Females

2080

F40-44

2080

Half→25K

13.1 - 15.5 mi

Top 34%
×4story building
+66ft-88ft

Overall

8984

Females

1544

F40-44

1544

25K→30K

15.5 - 18.6 mi

Top 28%
×9story building
+181ft-148ft

Overall

7490

Females

1108

F40-44

1108

30K→20M

18.6 - 20.0 mi

Top 26%
×5story building
+64ft-50ft

Overall

6854

Females

979

F40-44

979

20M→21M

20.0 - 21.0 mi

Top 31%
×8story building
+106ft-24ft

Overall

8323

Females

1649

F40-44

1649

21M→35K

21.0 - 21.8 mi

Top 27%
×7story building
+17ft-86ft

Overall

7229

Females

1191

F40-44

1191

35K→23M

21.8 - 23.0 mi

Top 21%
×5story building
+23ft-63ft

Overall

5677

Females

715

F40-44

715

23M→24M

23.0 - 24.0 mi

Top 17%
×6story building
+12ft-82ft

Overall

4548

Females

459

F40-44

459

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4188

Females

456

F40-44

456

40K→25.2M

24.9 - 25.2 mi

Top 21%
×1story
+13ft-16ft

Overall

5636

Females

949

F40-44

949

25.2M→Finish

25.2 - 26.2 mi

Top 20%
×2story building
+22ft-21ft

Overall

5352

Females

851

F40-44

851

Passing Analysis

Category:
Athletes Passed
3253*
Passed By
647
Net Change
+2606
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10970
5K → 10K209412-203#10970#11173
10K → 15K28297+185#11173#10988
15K → 20K28658+228#10988#10760
20K → Half3912+27#10760#10733
Half → 25K34912+337#10733#10396
25K → 30K569*6+563#10396#9833
30K → 20M2623+259#9833#9574
20M → 21M14026+114#9574#9460
21M → 35K1277+120#9460#9340
35K → 23M2593+256#9340#9084
23M → 24M2670+267#9084#8817
24M → 40K2060+206#8817#8611
40K → 25.2M696+63#8611#8548
25.2M → Finish1895+184#8548#8364
TOTALS3253*647+2606

* 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