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BOSTON MARATHON 2025

Iris Lam

Bib: 14248•F

NY

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 33%
Gender (Female)
#0 / 12228
Top 16%
Division (F18-39)
#0 / 5469
Top 29%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:25
Rank: #9606
Start → 5K
22:25 | 7:13/mi
10K· 6.21 mi
44:53
Rank: #9662 (-56)
5K → 10K
22:28 | 7:14/mi
15K· 9.32 mi
1:07:23
Rank: #9587 (+75)
10K → 15K
22:30 | 7:15/mi
20K· 12.43 mi
1:30:34
Rank: #9768 (-181)
15K → 20K
23:11 | 7:28/mi
Half· 13.11 mi
1:35:40
Rank: #9857 (-89)
20K → Half
5:06 | 7:29/mi
25K· 15.53 mi
1:54:02
Rank: #9911 (-54)
Half → 25K
18:22 | 7:35/mi
30K· 18.64 mi
2:18:00
Rank: #9736 (+175)
25K → 30K
23:58 | 7:43/mi
20M
2:28:33
Rank: #9614 (+122)
30K → 20M
10:33 | 7:46/mi
21M
2:36:54
Rank: #9572 (+42)
20M → 21M
8:21 | 8:21/mi
35K· 21.75 mi
2:42:27
Rank: #9490 (+82)
21M → 35K
5:33 | 7:25/mi
23M
2:52:18
Rank: #9426 (+64)
35K → 23M
9:51 | 7:52/mi
24M
3:00:10
Rank: #9427 (-1)
23M → 24M
7:52 | 7:52/mi
40K· 24.85 mi
3:07:00
Rank: #9452 (-25)
24M → 40K
6:50 | 8:00/mi
25.2M
3:10:06
Rank: #9481 (-29)
40K → 25.2M
3:06 | 8:59/mi
Finish· 26.22 mi
3:17:51
Rank: #9465 (+16)
25.2M → Finish
7:45 | 7:36/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:40
Pace7:18 /mi
2nd Half
Distance13.11 mi
Time1:42:11
Pace7:48 /mi
📊Positive Split: 6.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:3222:257:1322:25
7:13
-
10K
6.21 mi11:15:0044:537:1322:28
7:14
+0:01
15K
9.32 mi11:37:301:07:237:1422:30
7:15
+0:01
20K
12.43 mi12:00:411:30:347:1723:11
7:28
+0:13
Half
13.11 mi12:05:471:35:407:185:06
7:29
+0:01
25K
15.53 mi12:24:091:54:027:2018:22
7:35
+0:06
30K
18.64 mi12:48:072:18:007:2423:58
7:43
+0:08
20M
20.00 mi12:58:402:28:337:2610:33
7:46
+0:03
21M
21.00 mi13:07:012:36:547:288:21
8:21
+0:35
35K
21.75 mi13:12:342:42:277:285:33
7:25
-0:56
23M
23.00 mi13:22:252:52:187:299:51
7:52
+0:27
24M
24.00 mi13:30:173:00:107:307:52
7:52
0:00
40K
24.85 mi13:37:073:07:007:316:50
8:00
+0:08
25.2M
25.20 mi13:40:133:10:067:333:06
8:59
+0:59
Finish
26.22 mi13:47:583:17:517:337:45
7:36
-1:23

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

7:13 /mi

Average Pace

7:33 /mi

Slowest Pace

8:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:07:23

34% of race

Time at Steady Pace

1:34:28

48% of race

Time at Slower Pace

36:00

18% of race

Average Pace: 7:33 /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 mi10:52:3222:257:1322:25
7:13
#9606
10K
6.21 mi11:15:0044:537:1322:28
7:14
#9662
15K
9.32 mi11:37:301:07:237:1422:30
7:15
#9587
20K
12.43 mi12:00:411:30:347:1723:11
7:28
#9768
Half
13.11 mi12:05:471:35:407:185:06
7:29
#9857
25K
15.53 mi12:24:091:54:027:2018:22
7:35
#9911
30K
18.64 mi12:48:072:18:007:2423:58
7:43
#9736
20M
20.00 mi12:58:402:28:337:2610:33
7:46
#9614
21M
21.00 mi13:07:012:36:547:288:21
8:21
#9572
35K
21.75 mi13:12:342:42:277:285:33
7:25
#9490
23M
23.00 mi13:22:252:52:187:299:51
7:52
#9426
24M
24.00 mi13:30:173:00:107:307:52
7:52
#9427
40K
24.85 mi13:37:073:07:007:316:50
8:00
#9452
25.2M
25.20 mi13:40:133:10:067:333:06
8:59
#9481
Finish
26.22 mi13:47:583:17:517:337:45
7:36
#9465
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi9606163316339500(Top 33%)1652(Top 14%)1652(Top 30%)
10K6.21 mi3.10 mi9662-561647-141647-149772(Top 34%)1726(Top 14%)1726(Top 32%)
15K9.32 mi3.11 mi9587+751646+11646+19500(Top 33%)1652(Top 14%)1652(Top 30%)
20K12.43 mi3.11 mi9768-1811761-1151761-11510446(Top 37%)2184(Top 18%)2184(Top 40%)
Half13.11 mi0.68 mi9857-891802-411802-4111511(Top 41%)2670(Top 22%)2670(Top 49%)
25K15.53 mi2.42 mi9911-541862-601862-6010557(Top 37%)2348(Top 19%)2348(Top 43%)
30K18.64 mi3.11 mi9736+1751842+201842+209293(Top 33%)1961(Top 16%)1961(Top 36%)
20M20.00 mi1.36 mi9614+1221821+211821+218814(Top 31%)1895(Top 15%)1895(Top 35%)
21M21.00 mi1.00 mi9572+421829-81829-89551(Top 34%)2397(Top 20%)2397(Top 44%)
35K21.75 mi0.75 mi9490+821809+201809+208105(Top 29%)1731(Top 14%)1731(Top 32%)
23M23.00 mi1.25 mi9426+641824-151824-159069(Top 32%)2286(Top 19%)2286(Top 42%)
24M24.00 mi1.00 mi9427-11863-391863-3910335(Top 36%)2957(Top 24%)2957(Top 54%)
40K24.85 mi0.85 mi9452-251911-481911-4810153(Top 36%)2993(Top 24%)2993(Top 55%)
25.2M25.20 mi0.35 mi9481-291944-331944-3311764(Top 41%)3840(Top 31%)3840(Top 70%)
Finish26.22 mi1.02 mi9465+161978-341978-349987(Top 35%)2969(Top 24%)2969(Top 54%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21stories
+97ft-345ft

Overall

9500

Females

1652

F18-39

1652

5K→10K

3.1 - 6.2 mi

Top 34%
×5stories
+79ft-138ft

Overall

9772

Females

1726

F18-39

1726

10K→15K

6.2 - 9.3 mi

Top 33%
×3stories
+67ft-78ft

Overall

9500

Females

1652

F18-39

1652

15K→20K

9.3 - 12.4 mi

Top 37%
×5stories
+106ft-86ft

Overall

10446

Females

2184

F18-39

2184

20K→Half

12.4 - 13.1 mi

Top 41%
×2stories
+19ft-37ft

Overall

11511

Females

2670

F18-39

2670

Half→25K

13.1 - 15.5 mi

Top 37%
×4stories
+66ft-88ft

Overall

10557

Females

2348

F18-39

2348

25K→30K

15.5 - 18.6 mi

Top 33%
×9stories
+181ft-148ft

Overall

9293

Females

1961

F18-39

1961

30K→20M

18.6 - 20.0 mi

Top 31%
×5stories
+64ft-50ft

Overall

8814

Females

1895

F18-39

1895

20M→21M

20.0 - 21.0 mi

Top 34%
×8stories
+106ft-24ft

Overall

9551

Females

2397

F18-39

2397

21M→35K

21.0 - 21.8 mi

Top 29%
×7stories
+17ft-86ft

Overall

8105

Females

1731

F18-39

1731

35K→23M

21.8 - 23.0 mi

Top 32%
×5stories
+23ft-63ft

Overall

9069

Females

2286

F18-39

2286

23M→24M

23.0 - 24.0 mi

Top 36%
×6stories
+12ft-82ft

Overall

10335

Females

2957

F18-39

2957

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

10153

Females

2993

F18-39

2993

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

11764

Females

3840

F18-39

3840

25.2M→Finish

25.2 - 26.2 mi

Top 35%
×2stories
+22ft-21ft

Overall

9987

Females

2969

F18-39

2969

Passing Analysis

Category:
Athletes Passed
1773
Passed By
1631
Net Change
+141
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9606
5K → 10K207262-56#9606#9662
10K → 15K204129+75#9662#9587
15K → 20K130311-181#9587#9768
20K → Half16105-89#9768#9857
Half → 25K133187-54#9857#9911
25K → 30K309134+175#9911#9736
30K → 20M16745+122#9736#9614
20M → 21M10664+42#9614#9572
21M → 35K9816+82#9572#9490
35K → 23M14177+64#9490#9426
23M → 24M8687-1#9426#9427
24M → 40K6388-25#9427#9452
40K → 25.2M3059-29#9452#9481
25.2M → Finish8367+16#9481#9465
TOTALS17731631+141
📊

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