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BOSTON MARATHON 2025

Christina Lam

Bib: 17756•F

WA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
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
24:36
Rank: #15914
Start → 5K
24:36 | 7:55/mi
10K· 6.21 mi
48:31
Rank: #14867 (+1047)
5K → 10K
23:55 | 7:42/mi
15K· 9.32 mi
1:12:38
Rank: #14568 (+299)
10K → 15K
24:07 | 7:46/mi
20K· 12.43 mi
1:38:12
Rank: #15120 (-552)
15K → 20K
25:34 | 8:14/mi
Half· 13.11 mi
1:44:04
Rank: #15435 (-315)
20K → Half
5:52 | 8:36/mi
25K· 15.53 mi
2:05:16
Rank: #16062 (-627)
Half → 25K
21:12 | 8:45/mi
30K· 18.64 mi
2:33:09
Rank: #16323 (-261)
25K → 30K
27:53 | 8:58/mi
20M
2:45:50
Rank: #16453 (-130)
30K → 20M
12:41 | 9:20/mi
21M
2:55:29
Rank: #16433 (+20)
20M → 21M
9:39 | 9:39/mi
35K· 21.75 mi
3:01:58
Rank: #16398 (+35)
21M → 35K
6:29 | 8:40/mi
23M
3:15:09
Rank: #16913 (-515)
35K → 23M
13:11 | 10:32/mi
24M
3:32:05
Rank: #18970 (-2057)
23M → 24M
16:56 | 16:56/mi
40K· 24.85 mi
3:40:15
Rank: #18946 (+24)
24M → 40K
8:10 | 9:33/mi
25.2M
3:43:25
Rank: #18866 (+80)
40K → 25.2M
3:10 | 9:11/mi
Finish· 26.22 mi
3:51:41
Rank: #18682 (+184)
25.2M → Finish
8:16 | 8:07/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:04
Pace7:56 /mi
2nd Half
Distance13.11 mi
Time2:07:37
Pace9:44 /mi
📊Positive Split: 22.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:4124:367:5524:36
7:55
-
10K
6.21 mi11:39:3648:317:4823:55
7:42
-0:13
15K
9.32 mi12:03:431:12:387:4824:07
7:46
+0:04
20K
12.43 mi12:29:171:38:127:5425:34
8:14
+0:28
Half
13.11 mi12:35:091:44:047:565:52
8:36
+0:22
25K
15.53 mi12:56:212:05:168:0421:12
8:45
+0:09
30K
18.64 mi13:24:142:33:098:1327:53
8:58
+0:13
20M
20.00 mi13:36:552:45:508:1712:41
9:20
+0:22
21M
21.00 mi13:46:342:55:298:219:39
9:39
+0:19
35K
21.75 mi13:53:033:01:588:226:29
8:40
-0:59
23M
23.00 mi14:06:143:15:098:2913:11
10:32
+1:52
24M
24.00 mi14:23:103:32:058:5016:56
16:56
+6:24
40K
24.85 mi14:31:203:40:158:528:10
9:33
-7:23
25.2M
25.20 mi14:34:303:43:258:523:10
9:11
-0:22
Finish
26.22 mi14:42:463:51:418:518:16
8:07
-1:04

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

7:42 /mi

Average Pace

8:51 /mi

Slowest Pace

16:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:21:34

87% of race

Time at Slower Pace

30:07

13% of race

Average Pace: 8:50 /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 mi11:15:4124:367:5524:36
7:55
#15914
10K
6.21 mi11:39:3648:317:4823:55
7:42
#14867
15K
9.32 mi12:03:431:12:387:4824:07
7:46
#14568
20K
12.43 mi12:29:171:38:127:5425:34
8:14
#15120
Half
13.11 mi12:35:091:44:047:565:52
8:36
#15435
25K
15.53 mi12:56:212:05:168:0421:12
8:45
#16062
30K
18.64 mi13:24:142:33:098:1327:53
8:58
#16323
20M
20.00 mi13:36:552:45:508:1712:41
9:20
#16453
21M
21.00 mi13:46:342:55:298:219:39
9:39
#16433
35K
21.75 mi13:53:033:01:588:226:29
8:40
#16398
23M
23.00 mi14:06:143:15:098:2913:11
10:32
#16913
24M
24.00 mi14:23:103:32:058:5016:56
16:56
#18970
40K
24.85 mi14:31:203:40:158:528:10
9:33
#18946
25.2M
25.20 mi14:34:303:43:258:523:10
9:11
#18866
Finish
26.22 mi14:42:463:51:418:518:16
8:07
#18682
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi159145098509814070(Top 50%)4062(Top 33%)4062(Top 74%)
10K6.21 mi3.10 mi14867+10474474+6244474+62413906(Top 49%)3907(Top 32%)3907(Top 71%)
15K9.32 mi3.11 mi14568+2994297+1774297+17714070(Top 50%)4062(Top 33%)4062(Top 74%)
20K12.43 mi3.11 mi15120-5524644-3474644-34716509(Top 58%)5498(Top 45%)5498(Top 101%)
Half13.11 mi0.68 mi15435-3154831-1874831-18719834(Top 70%)7372(Top 60%)7372(Top 135%)
25K15.53 mi2.42 mi16062-6275199-3685199-36818651(Top 66%)6784(Top 55%)6784(Top 124%)
30K18.64 mi3.11 mi16323-2615429-2305429-23017568(Top 62%)6348(Top 52%)6348(Top 116%)
20M20.00 mi1.36 mi16453-1305531-1025531-10218459(Top 65%)6981(Top 57%)6981(Top 128%)
21M21.00 mi1.00 mi16433+205548-175548-1716813(Top 59%)6162(Top 50%)6162(Top 113%)
35K21.75 mi0.75 mi16398+355542+65542+616539(Top 58%)6098(Top 50%)6098(Top 112%)
23M23.00 mi1.25 mi16913-5155886-3445886-34422099(Top 78%)9114(Top 75%)9114(Top 167%)
24M24.00 mi1.00 mi18970-20577052-11667052-116628309(Top 100%)12200(Top 100%)12200(Top 223%)
40K24.85 mi0.85 mi18946+247070-187070-1818922(Top 67%)7592(Top 62%)7592(Top 139%)
25.2M25.20 mi0.35 mi18866+807030+407030+4012948(Top 46%)4506(Top 37%)4506(Top 82%)
Finish26.22 mi1.02 mi18682+1846948+826948+8213730(Top 48%)4828(Top 39%)4828(Top 88%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21stories
+97ft-345ft

Overall

14070

Females

4062

F18-39

4062

5K→10K

3.1 - 6.2 mi

Top 49%
×5stories
+79ft-138ft

Overall

13906

Females

3907

F18-39

3907

10K→15K

6.2 - 9.3 mi

Top 50%
×3stories
+67ft-78ft

Overall

14070

Females

4062

F18-39

4062

15K→20K

9.3 - 12.4 mi

Top 58%
×5stories
+106ft-86ft

Overall

16509

Females

5498

F18-39

5498

20K→Half

12.4 - 13.1 mi

Top 70%
×2stories
+19ft-37ft

Overall

19834

Females

7372

F18-39

7372

Half→25K

13.1 - 15.5 mi

Top 66%
×4stories
+66ft-88ft

Overall

18651

Females

6784

F18-39

6784

25K→30K

15.5 - 18.6 mi

Top 62%
×9stories
+181ft-148ft

Overall

17568

Females

6348

F18-39

6348

30K→20M

18.6 - 20.0 mi

Top 65%
×5stories
+64ft-50ft

Overall

18459

Females

6981

F18-39

6981

20M→21M

20.0 - 21.0 mi

Top 59%
×8stories
+106ft-24ft

Overall

16813

Females

6162

F18-39

6162

21M→35K

21.0 - 21.8 mi

Top 58%
×7stories
+17ft-86ft

Overall

16539

Females

6098

F18-39

6098

35K→23M

21.8 - 23.0 mi

Top 78%
×5stories
+23ft-63ft

Overall

22099

Females

9114

F18-39

9114

23M→24M

23.0 - 24.0 mi

Top 100%
×6stories
+12ft-82ft

Overall

28309

Females

12200

F18-39

12200

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

18922

Females

7592

F18-39

7592

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

12948

Females

4506

F18-39

4506

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2stories
+22ft-21ft

Overall

13730

Females

4828

F18-39

4828

Passing Analysis

Category:
Athletes Passed
2436
Passed By
5204
Net Change
-2768
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15914
5K → 10K109750+1047#15914#14867
10K → 15K37677+299#14867#14568
15K → 20K98650-552#14568#15120
20K → Half4319-315#15120#15435
Half → 25K52679-627#15435#16062
25K → 30K156417-261#16062#16323
30K → 20M71201-130#16323#16453
20M → 21M120100+20#16453#16433
21M → 35K7843+35#16433#16398
35K → 23M27542-515#16398#16913
23M → 24M12058-2057#16913#18970
24M → 40K8460+24#18970#18946
40K → 25.2M822+80#18946#18866
25.2M → Finish1906+184#18866#18682
TOTALS24365204-2768
📊

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