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BOSTON MARATHON 2025

Bronwyn Bird

Bib: 19657•F

NJ

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 50%
Gender (Female)
#0 / 12228
Top 36%
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:39
Rank: #16059
Start → 5K
24:39 | 7:56/mi
10K· 6.21 mi
49:01
Rank: #15574 (+485)
5K → 10K
24:22 | 7:51/mi
15K· 9.32 mi
1:13:19
Rank: #15216 (+358)
10K → 15K
24:18 | 7:49/mi
20K· 12.43 mi
1:37:46
Rank: #14816 (+400)
15K → 20K
24:27 | 7:52/mi
Half· 13.11 mi
1:43:13
Rank: #14868 (-52)
20K → Half
5:27 | 7:59/mi
25K· 15.53 mi
2:02:24
Rank: #14546 (+322)
Half → 25K
19:11 | 7:55/mi
30K· 18.64 mi
2:27:47
Rank: #14103 (+443)
25K → 30K
25:23 | 8:10/mi
20M
2:38:57
Rank: #13899 (+204)
30K → 20M
11:10 | 8:13/mi
21M
2:47:52
Rank: #13810 (+89)
20M → 21M
8:55 | 8:55/mi
35K· 21.75 mi
2:53:45
Rank: #13697 (+113)
21M → 35K
5:53 | 7:52/mi
23M
3:04:16
Rank: #13610 (+87)
35K → 23M
10:31 | 8:24/mi
24M
3:12:26
Rank: #13539 (+71)
23M → 24M
8:10 | 8:10/mi
40K· 24.85 mi
3:19:43
Rank: #13532 (+7)
24M → 40K
7:17 | 8:31/mi
25.2M
3:23:13
Rank: #13621 (-89)
40K → 25.2M
3:30 | 10:09/mi
Finish· 26.22 mi
3:33:08
Rank: #14069 (-448)
25.2M → Finish
9:55 | 9:44/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:13
Pace7:52 /mi
2nd Half
Distance13.11 mi
Time1:49:55
Pace8:23 /mi
📊Positive Split: 6.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:1024:397:5624:39
7:56
-
10K
6.21 mi11:41:3249:017:5324:22
7:51
-0:05
15K
9.32 mi12:05:501:13:197:5224:18
7:49
-0:02
20K
12.43 mi12:30:171:37:467:5224:27
7:52
+0:03
Half
13.11 mi12:35:441:43:137:525:27
7:59
+0:07
25K
15.53 mi12:54:552:02:247:5319:11
7:55
-0:04
30K
18.64 mi13:20:182:27:477:5625:23
8:10
+0:15
20M
20.00 mi13:31:282:38:577:5711:10
8:13
+0:03
21M
21.00 mi13:40:232:47:528:008:55
8:55
+0:42
35K
21.75 mi13:46:162:53:457:595:53
7:52
-1:03
23M
23.00 mi13:56:473:04:168:0110:31
8:24
+0:32
24M
24.00 mi14:04:573:12:268:018:10
8:10
-0:14
40K
24.85 mi14:12:143:19:438:027:17
8:31
+0:21
25.2M
25.20 mi14:15:443:23:138:043:30
10:09
+1:38
Finish
26.22 mi14:25:393:33:088:089:55
9:44
-0:25

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

7:49 /mi

Average Pace

8:08 /mi

Slowest Pace

10:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

24:18

11% of race

Time at Steady Pace

2:39:13

75% of race

Time at Slower Pace

29:37

14% of race

Average Pace: 8:08 /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 mi11:17:1024:397:5624:39
7:56
#16059
10K
6.21 mi11:41:3249:017:5324:22
7:51
#15574
15K
9.32 mi12:05:501:13:197:5224:18
7:49
#15216
20K
12.43 mi12:30:171:37:467:5224:27
7:52
#14816
Half
13.11 mi12:35:441:43:137:525:27
7:59
#14868
25K
15.53 mi12:54:552:02:247:5319:11
7:55
#14546
30K
18.64 mi13:20:182:27:477:5625:23
8:10
#14103
20M
20.00 mi13:31:282:38:577:5711:10
8:13
#13899
21M
21.00 mi13:40:232:47:528:008:55
8:55
#13810
35K
21.75 mi13:46:162:53:457:595:53
7:52
#13697
23M
23.00 mi13:56:473:04:168:0110:31
8:24
#13610
24M
24.00 mi14:04:573:12:268:018:10
8:10
#13539
40K
24.85 mi14:12:143:19:438:027:17
8:31
#13532
25.2M
25.20 mi14:15:443:23:138:043:30
10:09
#13621
Finish
26.22 mi14:25:393:33:088:089:55
9:44
#14069
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi160595180518014570(Top 51%)4349(Top 36%)4349(Top 80%)
10K6.21 mi3.10 mi15574+4854884+2964884+29615211(Top 54%)4669(Top 38%)4669(Top 85%)
15K9.32 mi3.11 mi15216+3584686+1984686+19814570(Top 51%)4349(Top 36%)4349(Top 80%)
20K12.43 mi3.11 mi14816+4004478+2084478+20813856(Top 49%)4012(Top 33%)4012(Top 73%)
Half13.11 mi0.68 mi14868-524518-404518-4015817(Top 56%)5052(Top 41%)5052(Top 92%)
25K15.53 mi2.42 mi14546+3224361+1574361+15713211(Top 47%)3783(Top 31%)3783(Top 69%)
30K18.64 mi3.11 mi14103+4434167+1944167+19412613(Top 44%)3629(Top 30%)3629(Top 66%)
20M20.00 mi1.36 mi13899+2044089+784089+7811952(Top 42%)3428(Top 28%)3428(Top 63%)
21M21.00 mi1.00 mi13810+894066+234066+2313051(Top 46%)4151(Top 34%)4151(Top 76%)
35K21.75 mi0.75 mi13697+1134020+464020+4611373(Top 40%)3325(Top 27%)3325(Top 61%)
23M23.00 mi1.25 mi13610+874019+14019+112709(Top 45%)4107(Top 34%)4107(Top 75%)
24M24.00 mi1.00 mi13539+713997+223997+2212388(Top 44%)3994(Top 33%)3994(Top 73%)
40K24.85 mi0.85 mi13532+74019-224019-2213571(Top 48%)4737(Top 39%)4737(Top 87%)
25.2M25.20 mi0.35 mi13621-894082-634082-6317688(Top 62%)6940(Top 57%)6940(Top 127%)
Finish26.22 mi1.02 mi14069-4484351-2694351-26922028(Top 78%)9165(Top 75%)9165(Top 168%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21stories
+97ft-345ft

Overall

14570

Females

4349

F18-39

4349

5K→10K

3.1 - 6.2 mi

Top 54%
×5stories
+79ft-138ft

Overall

15211

Females

4669

F18-39

4669

10K→15K

6.2 - 9.3 mi

Top 51%
×3stories
+67ft-78ft

Overall

14570

Females

4349

F18-39

4349

15K→20K

9.3 - 12.4 mi

Top 49%
×5stories
+106ft-86ft

Overall

13856

Females

4012

F18-39

4012

20K→Half

12.4 - 13.1 mi

Top 56%
×2stories
+19ft-37ft

Overall

15817

Females

5052

F18-39

5052

Half→25K

13.1 - 15.5 mi

Top 47%
×4stories
+66ft-88ft

Overall

13211

Females

3783

F18-39

3783

25K→30K

15.5 - 18.6 mi

Top 44%
×9stories
+181ft-148ft

Overall

12613

Females

3629

F18-39

3629

30K→20M

18.6 - 20.0 mi

Top 42%
×5stories
+64ft-50ft

Overall

11952

Females

3428

F18-39

3428

20M→21M

20.0 - 21.0 mi

Top 46%
×8stories
+106ft-24ft

Overall

13051

Females

4151

F18-39

4151

21M→35K

21.0 - 21.8 mi

Top 40%
×7stories
+17ft-86ft

Overall

11373

Females

3325

F18-39

3325

35K→23M

21.8 - 23.0 mi

Top 45%
×5stories
+23ft-63ft

Overall

12709

Females

4107

F18-39

4107

23M→24M

23.0 - 24.0 mi

Top 44%
×6stories
+12ft-82ft

Overall

12388

Females

3994

F18-39

3994

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

13571

Females

4737

F18-39

4737

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

17688

Females

6940

F18-39

6940

25.2M→Finish

25.2 - 26.2 mi

Top 78%
×2stories
+22ft-21ft

Overall

22028

Females

9165

F18-39

9165

Passing Analysis

Category:
Athletes Passed
3170
Passed By
1180
Net Change
+1990
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16059
5K → 10K611126+485#16059#15574
10K → 15K40446+358#15574#15216
15K → 20K43232+400#15216#14816
20K → Half1769-52#14816#14868
Half → 25K34826+322#14868#14546
25K → 30K49350+443#14546#14103
30K → 20M22824+204#14103#13899
20M → 21M14455+89#13899#13810
21M → 35K1152+113#13810#13697
35K → 23M15164+87#13697#13610
23M → 24M11746+71#13610#13539
24M → 40K7871+7#13539#13532
40K → 25.2M19108-89#13532#13621
25.2M → Finish13461-448#13621#14069
TOTALS31701180+1990
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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