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BOSTON MARATHON 2025

Chin-Yu Chang-Clark

Bib: 22934•F

NJ

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 39%
Division (F50-54)
#0 / 1303
Top 33%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:39
Rank: #20342
Start → 5K
8:35/mi
26:39 split
10K· 6.21 mi
52:47
Rank: #19806 (+536)
5K → 10K
8:25/mi
26:08 split
15K· 9.32 mi
1:18:48
Rank: #19380 (+426)
10K → 15K
8:22/mi
26:01 split
20K· 12.43 mi
1:45:02
Rank: #18964 (+416)
15K → 20K
8:27/mi
26:14 split
Half· 13.11 mi
1:50:45
Rank: #18945 (+19)
20K → Half
8:23/mi
5:43 split
25K· 15.53 mi
2:11:19
Rank: #18614 (+331)
Half → 25K
8:29/mi
20:34 split
30K· 18.64 mi
2:38:33
Rank: #18167 (+447)
25K → 30K
8:46/mi
27:14 split
20M
2:50:32
Rank: #17944 (+223)
30K → 20M
8:49/mi
11:59 split
21M
2:59:37
Rank: #17715 (+229)
20M → 21M
9:05/mi
9:05 split
35K· 21.75 mi
3:05:49
Rank: #17568 (+147)
21M → 35K
8:17/mi
6:12 split
23M
3:16:51
Rank: #17398 (+170)
35K → 23M
8:49/mi
11:02 split
24M
3:25:38
Rank: #17342 (+56)
23M → 24M
8:47/mi
8:47 split
40K· 24.85 mi
3:33:18
Rank: #17283 (+59)
24M → 40K
8:58/mi
7:40 split
25.2M
3:36:35
Rank: #17244 (+39)
40K → 25.2M
9:31/mi
3:17 split
Finish· 26.22 mi
3:45:14
Rank: #17202 (+42)
25.2M → Finish
8:29/mi
8:39 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:45
Pace8:27 /mi
2nd Half
Distance13.11 mi
Time1:54:29
Pace8:44 /mi
📊Positive Split: 3.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:5826:398:3526:39
8:35
-
10K
6.21 mi11:49:0652:478:3026:08
8:25
-0:10
15K
9.32 mi12:15:071:18:488:2726:01
8:22
-0:03
20K
12.43 mi12:41:211:45:028:2726:14
8:27
+0:05
Half
13.11 mi12:47:041:50:458:275:43
8:23
-0:04
25K
15.53 mi13:07:382:11:198:2720:34
8:29
+0:06
30K
18.64 mi13:34:522:38:338:3027:14
8:46
+0:17
20M
20.00 mi13:46:512:50:328:3211:59
8:49
+0:03
21M
21.00 mi13:55:562:59:378:339:05
9:05
+0:16
35K
21.75 mi14:02:083:05:498:336:12
8:17
-0:48
23M
23.00 mi14:13:103:16:518:3411:02
8:49
+0:32
24M
24.00 mi14:21:573:25:388:348:47
8:47
-0:02
40K
24.85 mi14:29:373:33:188:357:40
8:58
+0:11
25.2M
25.20 mi14:32:543:36:358:363:17
9:31
+0:33
Finish
26.22 mi14:41:333:45:148:368:39
8:29
-1:02

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

8:17 /mi

Average Pace

8:36 /mi

Slowest Pace

9:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:41:57

99% of race

Time at Steady Pace

3:17

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:35 /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 mi11:22:5826:398:3526:39
8:35
#20342
10K
6.21 mi11:49:0652:478:3026:08
8:25
#19806
15K
9.32 mi12:15:071:18:488:2726:01
8:22
#19380
20K
12.43 mi12:41:211:45:028:2726:14
8:27
#18964
Half
13.11 mi12:47:041:50:458:275:43
8:23
#18945
25K
15.53 mi13:07:382:11:198:2720:34
8:29
#18614
30K
18.64 mi13:34:522:38:338:3027:14
8:46
#18167
20M
20.00 mi13:46:512:50:328:3211:59
8:49
#17944
21M
21.00 mi13:55:562:59:378:339:05
9:05
#17715
35K
21.75 mi14:02:083:05:498:336:12
8:17
#17568
23M
23.00 mi14:13:103:16:518:3411:02
8:49
#17398
24M
24.00 mi14:21:573:25:388:348:47
8:47
#17342
40K
24.85 mi14:29:373:33:188:357:40
8:58
#17283
25.2M
25.20 mi14:32:543:36:358:363:17
9:31
#17244
Finish
26.22 mi14:41:333:45:148:368:39
8:29
#17202
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi203427708770818545(Top 65%)6628(Top 54%)6628(Top 509%)
10K6.21 mi3.10 mi19806+5367358+3507358+35019268(Top 68%)7035(Top 58%)7035(Top 540%)
15K9.32 mi3.11 mi19380+4267111+2477111+24718545(Top 65%)6628(Top 54%)6628(Top 509%)
20K12.43 mi3.11 mi18964+4166882+2296882+22917841(Top 63%)6254(Top 51%)6254(Top 480%)
Half13.11 mi0.68 mi18945+196877+56877+518502(Top 65%)6616(Top 54%)6616(Top 508%)
25K15.53 mi2.42 mi18614+3316701+1766701+17617097(Top 60%)5910(Top 48%)5910(Top 454%)
30K18.64 mi3.11 mi18167+4476486+2156486+21516406(Top 58%)5693(Top 47%)5693(Top 437%)
20M20.00 mi1.36 mi17944+2236391+956391+9515793(Top 56%)5479(Top 45%)5479(Top 420%)
21M21.00 mi1.00 mi17715+2296277+1146277+11414043(Top 49%)4665(Top 38%)4665(Top 358%)
35K21.75 mi0.75 mi17568+1476225+526225+5214230(Top 50%)4818(Top 39%)4818(Top 370%)
23M23.00 mi1.25 mi17398+1706167+586167+5815200(Top 54%)5440(Top 44%)5440(Top 417%)
24M24.00 mi1.00 mi17342+566161+66161+616251(Top 57%)6077(Top 50%)6077(Top 466%)
40K24.85 mi0.85 mi17283+596148+136148+1316130(Top 57%)6111(Top 50%)6111(Top 469%)
25.2M25.20 mi0.35 mi17244+396140+86140+814772(Top 52%)5442(Top 45%)5442(Top 418%)
Finish26.22 mi1.02 mi17202+426131+96131+916177(Top 57%)6121(Top 50%)6121(Top 470%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21stories
+97ft-345ft

Overall

18545

Females

6628

F50-54

6628

5K→10K

3.1 - 6.2 mi

Top 68%
×5stories
+79ft-138ft

Overall

19268

Females

7035

F50-54

7035

10K→15K

6.2 - 9.3 mi

Top 65%
×3stories
+67ft-78ft

Overall

18545

Females

6628

F50-54

6628

15K→20K

9.3 - 12.4 mi

Top 63%
×5stories
+106ft-86ft

Overall

17841

Females

6254

F50-54

6254

20K→Half

12.4 - 13.1 mi

Top 65%
×2stories
+19ft-37ft

Overall

18502

Females

6616

F50-54

6616

Half→25K

13.1 - 15.5 mi

Top 60%
×4stories
+66ft-88ft

Overall

17097

Females

5910

F50-54

5910

25K→30K

15.5 - 18.6 mi

Top 58%
×9stories
+181ft-148ft

Overall

16406

Females

5693

F50-54

5693

30K→20M

18.6 - 20.0 mi

Top 56%
×5stories
+64ft-50ft

Overall

15793

Females

5479

F50-54

5479

20M→21M

20.0 - 21.0 mi

Top 49%
×8stories
+106ft-24ft

Overall

14043

Females

4665

F50-54

4665

21M→35K

21.0 - 21.8 mi

Top 50%
×7stories
+17ft-86ft

Overall

14230

Females

4818

F50-54

4818

35K→23M

21.8 - 23.0 mi

Top 54%
×5stories
+23ft-63ft

Overall

15200

Females

5440

F50-54

5440

23M→24M

23.0 - 24.0 mi

Top 57%
×6stories
+12ft-82ft

Overall

16251

Females

6077

F50-54

6077

24M→40K

24.0 - 24.9 mi

Top 57%
×1story
+6ft-20ft

Overall

16130

Females

6111

F50-54

6111

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1story
+13ft-16ft

Overall

14772

Females

5442

F50-54

5442

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2stories
+22ft-21ft

Overall

16177

Females

6121

F50-54

6121

Passing Analysis

Category:
Athletes Passed
3627
Passed By
487
Net Change
+3140
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20342
5K → 10K648112+536#20342#19806
10K → 15K46943+426#19806#19380
15K → 20K44933+416#19380#18964
20K → Half3819+19#18964#18945
Half → 25K34716+331#18945#18614
25K → 30K49851+447#18614#18167
30K → 20M24017+223#18167#17944
20M → 21M24213+229#17944#17715
21M → 35K1514+147#17715#17568
35K → 23M20030+170#17568#17398
23M → 24M11357+56#17398#17342
24M → 40K9233+59#17342#17283
40K → 25.2M5516+39#17283#17244
25.2M → Finish8543+42#17244#17202
TOTALS3627487+3140
📊

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