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BOSTON MARATHON 2025

Jui Chun Lee

Bib: 18469•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 42%
Masters (Masters Women)
#0 / 6759
Top 29%
Division (F45-49)
#0 / 1813
Top 35%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:26
Rank: #12634
Start → 5K
23:26 | 7:33/mi
10K· 6.21 mi
47:31
Rank: #13477 (-843)
5K → 10K
24:05 | 7:45/mi
15K· 9.32 mi
1:12:30
Rank: #14454 (-977)
10K → 15K
24:59 | 8:02/mi
20K· 12.43 mi
1:38:40
Rank: #15449 (-995)
15K → 20K
26:10 | 8:25/mi
Half· 13.11 mi
1:44:12
Rank: #15526 (-77)
20K → Half
5:32 | 8:07/mi
25K· 15.53 mi
2:04:45
Rank: #15809 (-283)
Half → 25K
20:33 | 8:29/mi
30K· 18.64 mi
2:32:04
Rank: #15922 (-113)
25K → 30K
27:19 | 8:48/mi
20M
2:44:44
Rank: #16111 (-189)
30K → 20M
12:40 | 9:19/mi
21M
2:54:17
Rank: #16074 (+37)
20M → 21M
9:33 | 9:33/mi
35K· 21.75 mi
3:00:20
Rank: #15923 (+151)
21M → 35K
6:03 | 8:05/mi
23M
3:11:14
Rank: #15775 (+148)
35K → 23M
10:54 | 8:42/mi
24M
3:19:28
Rank: #15646 (+129)
23M → 24M
8:14 | 8:14/mi
40K· 24.85 mi
3:26:58
Rank: #15602 (+44)
24M → 40K
7:30 | 8:46/mi
25.2M
3:30:20
Rank: #15601 (+1)
40K → 25.2M
3:22 | 9:46/mi
Finish· 26.22 mi
3:38:43
Rank: #15539 (+62)
25.2M → Finish
8:23 | 8:14/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:12
Pace7:57 /mi
2nd Half
Distance13.11 mi
Time1:54:31
Pace8:44 /mi
📊Positive Split: 9.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:0823:267:3323:26
7:33
-
10K
6.21 mi11:40:1347:317:3924:05
7:45
+0:12
15K
9.32 mi12:05:121:12:307:4724:59
8:02
+0:17
20K
12.43 mi12:31:221:38:407:5626:10
8:25
+0:23
Half
13.11 mi12:36:541:44:127:575:32
8:07
-0:18
25K
15.53 mi12:57:272:04:458:0220:33
8:29
+0:22
30K
18.64 mi13:24:462:32:048:0927:19
8:48
+0:19
20M
20.00 mi13:37:262:44:448:1412:40
9:19
+0:31
21M
21.00 mi13:46:592:54:178:189:33
9:33
+0:14
35K
21.75 mi13:53:023:00:208:186:03
8:05
-1:28
23M
23.00 mi14:03:563:11:148:1910:54
8:42
+0:37
24M
24.00 mi14:12:103:19:288:198:14
8:14
-0:28
40K
24.85 mi14:19:403:26:588:207:30
8:46
+0:32
25.2M
25.20 mi14:23:023:30:208:213:22
9:46
+1:00
Finish
26.22 mi14:31:253:38:438:218:23
8:14
-1:32

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

7:33 /mi

Average Pace

8:21 /mi

Slowest Pace

9:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:18:33

36% of race

Time at Steady Pace

1:19:46

36% of race

Time at Slower Pace

1:00:24

28% of race

Average Pace: 8:20 /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 mi11:16:0823:267:3323:26
7:33
#12634
10K
6.21 mi11:40:1347:317:3924:05
7:45
#13477
15K
9.32 mi12:05:121:12:307:4724:59
8:02
#14454
20K
12.43 mi12:31:221:38:407:5626:10
8:25
#15449
Half
13.11 mi12:36:541:44:127:575:32
8:07
#15526
25K
15.53 mi12:57:272:04:458:0220:33
8:29
#15809
30K
18.64 mi13:24:462:32:048:0927:19
8:48
#15922
20M
20.00 mi13:37:262:44:448:1412:40
9:19
#16111
21M
21.00 mi13:46:592:54:178:189:33
9:33
#16074
35K
21.75 mi13:53:023:00:208:186:03
8:05
#15923
23M
23.00 mi14:03:563:11:148:1910:54
8:42
#15775
24M
24.00 mi14:12:103:19:288:198:14
8:14
#15646
40K
24.85 mi14:19:403:26:588:207:30
8:46
#15602
25.2M
25.20 mi14:23:023:30:208:213:22
9:46
#15601
Finish
26.22 mi14:31:253:38:438:218:23
8:14
#15539
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi126343130313016365(Top 58%)5353(Top 44%)5353(Top 295%)
10K6.21 mi3.10 mi13477-8433638-5083638-50814367(Top 51%)4179(Top 34%)4179(Top 231%)
15K9.32 mi3.11 mi14454-9774234-5964234-59616365(Top 58%)5353(Top 44%)5353(Top 295%)
20K12.43 mi3.11 mi15449-9954831-5974831-59717691(Top 62%)6158(Top 50%)6158(Top 340%)
Half13.11 mi0.68 mi15526-774879-484879-4816710(Top 59%)5585(Top 46%)5585(Top 308%)
25K15.53 mi2.42 mi15809-2835059-1805059-18017033(Top 60%)5868(Top 48%)5868(Top 324%)
30K18.64 mi3.11 mi15922-1135178-1195178-11916561(Top 58%)5777(Top 47%)5777(Top 319%)
20M20.00 mi1.36 mi16111-1895330-1525330-15218395(Top 65%)6944(Top 57%)6944(Top 383%)
21M21.00 mi1.00 mi16074+375340-105340-1016319(Top 57%)5878(Top 48%)5878(Top 324%)
35K21.75 mi0.75 mi15923+1515277+635277+6312906(Top 45%)4125(Top 34%)4125(Top 228%)
23M23.00 mi1.25 mi15775+1485239+385239+3814610(Top 51%)5130(Top 42%)5130(Top 283%)
24M24.00 mi1.00 mi15646+1295177+625177+6212843(Top 45%)4243(Top 35%)4243(Top 234%)
40K24.85 mi0.85 mi15602+445181-45181-415041(Top 53%)5536(Top 45%)5536(Top 305%)
25.2M25.20 mi0.35 mi15601+15191-105191-1015952(Top 56%)6057(Top 50%)6057(Top 334%)
Finish26.22 mi1.02 mi15539+625174+175174+1714471(Top 51%)5194(Top 42%)5194(Top 286%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×21stories
+97ft-345ft

Overall

16365

Females

5353

F45-49

5353

5K→10K

3.1 - 6.2 mi

Top 51%
×5stories
+79ft-138ft

Overall

14367

Females

4179

F45-49

4179

10K→15K

6.2 - 9.3 mi

Top 58%
×3stories
+67ft-78ft

Overall

16365

Females

5353

F45-49

5353

15K→20K

9.3 - 12.4 mi

Top 62%
×5stories
+106ft-86ft

Overall

17691

Females

6158

F45-49

6158

20K→Half

12.4 - 13.1 mi

Top 59%
×2stories
+19ft-37ft

Overall

16710

Females

5585

F45-49

5585

Half→25K

13.1 - 15.5 mi

Top 60%
×4stories
+66ft-88ft

Overall

17033

Females

5868

F45-49

5868

25K→30K

15.5 - 18.6 mi

Top 58%
×9stories
+181ft-148ft

Overall

16561

Females

5777

F45-49

5777

30K→20M

18.6 - 20.0 mi

Top 65%
×5stories
+64ft-50ft

Overall

18395

Females

6944

F45-49

6944

20M→21M

20.0 - 21.0 mi

Top 57%
×8stories
+106ft-24ft

Overall

16319

Females

5878

F45-49

5878

21M→35K

21.0 - 21.8 mi

Top 45%
×7stories
+17ft-86ft

Overall

12906

Females

4125

F45-49

4125

35K→23M

21.8 - 23.0 mi

Top 51%
×5stories
+23ft-63ft

Overall

14610

Females

5130

F45-49

5130

23M→24M

23.0 - 24.0 mi

Top 45%
×6stories
+12ft-82ft

Overall

12843

Females

4243

F45-49

4243

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

15041

Females

5536

F45-49

5536

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1story
+13ft-16ft

Overall

15952

Females

6057

F45-49

6057

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2stories
+22ft-21ft

Overall

14471

Females

5194

F45-49

5194

Passing Analysis

Category:
Athletes Passed
1334
Passed By
4239
Net Change
-2905
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12634
5K → 10K57900-843#12634#13477
10K → 15K391016-977#13477#14454
15K → 20K521047-995#14454#15449
20K → Half1390-77#15449#15526
Half → 25K106389-283#15526#15809
25K → 30K191304-113#15809#15922
30K → 20M64253-189#15922#16111
20M → 21M11679+37#16111#16074
21M → 35K1609+151#16074#15923
35K → 23M18133+148#15923#15775
23M → 24M1378+129#15775#15646
24M → 40K9854+44#15646#15602
40K → 25.2M2726+1#15602#15601
25.2M → Finish9331+62#15601#15539
TOTALS13344239-2905
📊

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