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BOSTON MARATHON 2025

Chia-Ju Lin

Bib: 20549•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F40-44)
#0 / 1718
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
29:16
Rank: #23961
Start → 5K
29:16 | 9:25/mi
10K· 6.21 mi
59:59
Rank: #24616 (-655)
5K → 10K
30:43 | 9:53/mi
15K· 9.32 mi
1:33:30
Rank: #25364 (-748)
10K → 15K
33:31 | 10:47/mi
20K· 12.43 mi
2:10:47
Rank: #26016 (-652)
15K → 20K
37:17 | 12:00/mi
Half· 13.11 mi
2:19:35
Rank: #26226 (-210)
20K → Half
8:48 | 12:54/mi
25K· 15.53 mi
2:49:21
Rank: #26348 (-122)
Half → 25K
29:46 | 12:17/mi
30K· 18.64 mi
3:30:11
Rank: #26503 (-155)
25K → 30K
40:50 | 13:09/mi
20M
3:50:25
Rank: #26673 (-170)
30K → 20M
20:14 | 14:53/mi
21M
4:04:51
Rank: #26691 (-18)
20M → 21M
14:26 | 14:26/mi
35K· 21.75 mi
4:14:38
Rank: #26721 (-30)
21M → 35K
9:47 | 13:05/mi
23M
4:31:36
Rank: #26745 (-24)
35K → 23M
16:58 | 13:33/mi
24M
4:43:51
Rank: #26722 (+23)
23M → 24M
12:15 | 12:15/mi
40K· 24.85 mi
4:54:59
Rank: #26722
24M → 40K
11:08 | 13:01/mi
25.2M
4:59:40
Rank: #26715 (+7)
40K → 25.2M
4:41 | 13:35/mi
Finish· 26.22 mi
5:10:37
Rank: #26674 (+41)
25.2M → Finish
10:57 | 10:45/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:19:35
Pace10:39 /mi
2nd Half
Distance13.11 mi
Time2:51:02
Pace13:03 /mi
📊Positive Split: 22.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:4329:169:2529:16
9:25
-
10K
6.21 mi11:56:2659:599:3930:43
9:53
+0:28
15K
9.32 mi12:29:571:33:3010:0233:31
10:47
+0:54
20K
12.43 mi13:07:142:10:4710:3137:17
12:00
+1:13
Half
13.11 mi13:16:022:19:3510:398:48
12:54
+0:54
25K
15.53 mi13:45:482:49:2110:5429:46
12:17
-0:37
30K
18.64 mi14:26:383:30:1111:1740:50
13:09
+0:52
20M
20.00 mi14:46:523:50:2511:3120:14
14:53
+1:44
21M
21.00 mi15:01:184:04:5111:4014:26
14:26
-0:27
35K
21.75 mi15:11:054:14:3811:439:47
13:05
-1:21
23M
23.00 mi15:28:034:31:3611:4916:58
13:33
+0:28
24M
24.00 mi15:40:184:43:5111:5012:15
12:15
-1:18
40K
24.85 mi15:51:264:54:5911:5211:08
13:01
+0:46
25.2M
25.20 mi15:56:074:59:4011:544:41
13:35
+0:34
Finish
26.22 mi16:07:045:10:3711:5110:57
10:45
-2:50

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

9:25 /mi

Average Pace

11:51 /mi

Slowest Pace

14:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:21:44

46% of race

Time at Steady Pace

2:14:13

43% of race

Time at Slower Pace

34:40

11% of race

Average Pace: 11:51 /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 mi11:25:4329:169:2529:16
9:25
#23961
10K
6.21 mi11:56:2659:599:3930:43
9:53
#24616
15K
9.32 mi12:29:571:33:3010:0233:31
10:47
#25364
20K
12.43 mi13:07:142:10:4710:3137:17
12:00
#26016
Half
13.11 mi13:16:022:19:3510:398:48
12:54
#26226
25K
15.53 mi13:45:482:49:2110:5429:46
12:17
#26348
30K
18.64 mi14:26:383:30:1111:1740:50
13:09
#26503
20M
20.00 mi14:46:523:50:2511:3120:14
14:53
#26673
21M
21.00 mi15:01:184:04:5111:4014:26
14:26
#26691
35K
21.75 mi15:11:054:14:3811:439:47
13:05
#26721
23M
23.00 mi15:28:034:31:3611:4916:58
13:33
#26745
24M
24.00 mi15:40:184:43:5111:5012:15
12:15
#26722
40K
24.85 mi15:51:264:54:5911:5211:08
13:01
#26722
25.2M
25.20 mi15:56:074:59:4011:544:41
13:35
#26715
Finish
26.22 mi16:07:045:10:3711:5110:57
10:45
#26674
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi239619681968126392(Top 93%)10998(Top 90%)10998(Top 640%)
10K6.21 mi3.10 mi24616-65510017-33610017-33625055(Top 88%)10265(Top 84%)10265(Top 597%)
15K9.32 mi3.11 mi25364-74810423-40610423-40626392(Top 93%)10998(Top 90%)10998(Top 640%)
20K12.43 mi3.11 mi26016-65210797-37410797-37427120(Top 95%)11469(Top 94%)11469(Top 668%)
Half13.11 mi0.68 mi26226-21010908-11110908-11127953(Top 98%)11977(Top 98%)11977(Top 697%)
25K15.53 mi2.42 mi26348-12210981-7310981-7326723(Top 94%)11264(Top 92%)11264(Top 656%)
30K18.64 mi3.11 mi26503-15511104-12311104-12326814(Top 94%)11390(Top 93%)11390(Top 663%)
20M20.00 mi1.36 mi26673-17011217-11311217-11327813(Top 98%)11973(Top 98%)11973(Top 697%)
21M21.00 mi1.00 mi26691-1811233-1611233-1626642(Top 94%)11392(Top 93%)11392(Top 663%)
35K21.75 mi0.75 mi26721-3011262-2911262-2927023(Top 95%)11600(Top 95%)11600(Top 675%)
23M23.00 mi1.25 mi26745-2411283-2111283-2126914(Top 95%)11560(Top 95%)11560(Top 673%)
24M24.00 mi1.00 mi26722+23112831128325980(Top 91%)11125(Top 91%)11125(Top 648%)
40K24.85 mi0.85 mi2672211286-311286-326308(Top 93%)11297(Top 92%)11297(Top 658%)
25.2M25.20 mi0.35 mi26715+711289-311289-325753(Top 91%)11070(Top 91%)11070(Top 644%)
Finish26.22 mi1.02 mi26674+4111274+1511274+1524816(Top 87%)10576(Top 86%)10576(Top 616%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 93%
×21stories
+97ft-345ft

Overall

26392

Females

10998

F40-44

10998

5K→10K

3.1 - 6.2 mi

Top 88%
×5stories
+79ft-138ft

Overall

25055

Females

10265

F40-44

10265

10K→15K

6.2 - 9.3 mi

Top 93%
×3stories
+67ft-78ft

Overall

26392

Females

10998

F40-44

10998

15K→20K

9.3 - 12.4 mi

Top 95%
×5stories
+106ft-86ft

Overall

27120

Females

11469

F40-44

11469

20K→Half

12.4 - 13.1 mi

Top 98%
×2stories
+19ft-37ft

Overall

27953

Females

11977

F40-44

11977

Half→25K

13.1 - 15.5 mi

Top 94%
×4stories
+66ft-88ft

Overall

26723

Females

11264

F40-44

11264

25K→30K

15.5 - 18.6 mi

Top 94%
×9stories
+181ft-148ft

Overall

26814

Females

11390

F40-44

11390

30K→20M

18.6 - 20.0 mi

Top 98%
×5stories
+64ft-50ft

Overall

27813

Females

11973

F40-44

11973

20M→21M

20.0 - 21.0 mi

Top 94%
×8stories
+106ft-24ft

Overall

26642

Females

11392

F40-44

11392

21M→35K

21.0 - 21.8 mi

Top 95%
×7stories
+17ft-86ft

Overall

27023

Females

11600

F40-44

11600

35K→23M

21.8 - 23.0 mi

Top 95%
×5stories
+23ft-63ft

Overall

26914

Females

11560

F40-44

11560

23M→24M

23.0 - 24.0 mi

Top 91%
×6stories
+12ft-82ft

Overall

25980

Females

11125

F40-44

11125

24M→40K

24.0 - 24.9 mi

Top 93%
×1story
+6ft-20ft

Overall

26308

Females

11297

F40-44

11297

40K→25.2M

24.9 - 25.2 mi

Top 91%
×1story
+13ft-16ft

Overall

25753

Females

11070

F40-44

11070

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2stories
+22ft-21ft

Overall

24816

Females

10576

F40-44

10576

Passing Analysis

Category:
Athletes Passed
401
Passed By
3114
Net Change
-2713
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23961
5K → 10K56711-655#23961#24616
10K → 15K17765-748#24616#25364
15K → 20K16668-652#25364#26016
20K → Half5215-210#26016#26226
Half → 25K45167-122#26226#26348
25K → 30K54209-155#26348#26503
30K → 20M11181-170#26503#26673
20M → 21M3250-18#26673#26691
21M → 35K1343-30#26691#26721
35K → 23M2953-24#26721#26745
23M → 24M4118+23#26745#26722
24M → 40K22220#26722#26722
40K → 25.2M147+7#26722#26715
25.2M → Finish465+41#26715#26674
TOTALS4013114-2713
📊

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