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BOSTON MARATHON 2025

Hui Chen Chang

Bib: 24507•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F55-59)
#0 / 994
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:00/mi
27:58
↑ 97↓ 3451.5%
10K· 6.21 mi
10:41/mi
1:01:11
↑ 79↓ 1380.4%
15K· 9.32 mi
10:15/mi
1:33:02
↑ 67↓ 78
20K· 12.43 mi
10:59/mi
2:07:09
↑ 106↓ 860.1%
Half· 13.11 mi
11:27/mi
2:14:58
↑ 19↓ 370.5%
25K· 15.53 mi
10:32/mi
2:40:31
↑ 66↓ 880.2%
30K· 18.64 mi
11:50/mi
3:17:17
↑ 181↓ 1480.2%
20M
11:46/mi
3:33:17
↑ 64↓ 500.2%
21M
13:56/mi
3:47:13
↑ 106↓ 241.6%
35K· 21.75 mi
11:06/mi
3:55:31
↑ 17↓ 861.7%
23M
11:09/mi
4:09:29
↑ 23↓ 630.6%
24M
10:56/mi
4:20:25
↓ 821.3%
40K· 24.85 mi
10:56/mi
4:29:46
↓ 200.3%
25.2M
13:41/mi
4:34:29
↑ 13↓ 160.2%
Finish· 26.22 mi
10:39/mi
4:45:20
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:14:58
Pace10:18 /mi
2nd Half
Distance13.11 mi
Time2:30:22
Pace11:28 /mi
📊Positive Split: 11.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:27:5327:589:0027:58
9:00
-
10K
6.21 mi12:01:061:01:119:5133:13
10:41
+1:41
15K
9.32 mi12:32:571:33:029:5931:51
10:15
-0:26
20K
12.43 mi13:07:042:07:0910:1434:07
10:59
+0:44
Half
13.11 mi13:14:532:14:5810:187:49
11:27
+0:28
25K
15.53 mi13:40:262:40:3110:2025:33
10:32
-0:55
30K
18.64 mi14:17:123:17:1710:3536:46
11:50
+1:18
20M
20.00 mi14:33:123:33:1710:4016:00
11:46
-0:04
21M
21.00 mi14:47:083:47:1310:4913:56
13:56
+2:10
35K
21.75 mi14:55:263:55:3110:508:18
11:06
-2:50
23M
23.00 mi15:09:244:09:2910:5113:58
11:09
+0:03
24M
24.00 mi15:20:204:20:2510:5110:56
10:56
-0:13
40K
24.85 mi15:29:414:29:4610:519:21
10:56
0:00
25.2M
25.20 mi15:34:244:34:2910:544:43
13:41
+2:45
Finish
26.22 mi15:45:154:45:2010:5310:51
10:39
-3:02

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

9:00 /mi

Average Pace

10:53 /mi

Slowest Pace

13:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

59:49

21% of race

Time at Steady Pace

2:34:06

54% of race

Time at Slower Pace

1:11:25

25% of race

Average Pace: 10:53 /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 mi11:27:5327:589:0027:58
9:00
#22395
10K
6.21 mi12:01:061:01:119:5133:13
10:41
#25065
15K
9.32 mi12:32:571:33:029:5931:51
10:15
#25234
20K
12.43 mi13:07:042:07:0910:1434:07
10:59
#25491
Half
13.11 mi13:14:532:14:5810:187:49
11:27
#25595
25K
15.53 mi13:40:262:40:3110:2025:33
10:32
#25387
30K
18.64 mi14:17:123:17:1710:3536:46
11:50
#25385
20M
20.00 mi14:33:123:33:1710:4016:00
11:46
#25357
21M
21.00 mi14:47:083:47:1310:4913:56
13:56
#25437
35K
21.75 mi14:55:263:55:3110:508:18
11:06
#25398
23M
23.00 mi15:09:244:09:2910:5113:58
11:09
#25314
24M
24.00 mi15:20:204:20:2510:5110:56
10:56
#25252
40K
24.85 mi15:29:414:29:4610:519:21
10:56
#25198
25.2M
25.20 mi15:34:244:34:2910:544:43
13:41
#25210
Finish
26.22 mi15:45:154:45:2010:5310:51
10:39
#25208
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi223958857885725505(Top 90%)10508(Top 86%)10508(Top 1057%)
10K6.21 mi3.10 mi25065-267010263-140610263-140626580(Top 94%)11108(Top 91%)11108(Top 1118%)
15K9.32 mi3.11 mi25234-16910354-9110354-9125505(Top 90%)10508(Top 86%)10508(Top 1057%)
20K12.43 mi3.11 mi25491-25710507-15310507-15325964(Top 91%)10789(Top 88%)10789(Top 1085%)
Half13.11 mi0.68 mi25595-10410559-5210559-5227010(Top 95%)11423(Top 93%)11423(Top 1149%)
25K15.53 mi2.42 mi25387+20810467+9210467+9224433(Top 86%)9981(Top 82%)9981(Top 1004%)
30K18.64 mi3.11 mi25385+210498-3110498-3125360(Top 89%)10594(Top 87%)10594(Top 1066%)
20M20.00 mi1.36 mi25357+2810497+110497+124944(Top 88%)10444(Top 85%)10444(Top 1051%)
21M21.00 mi1.00 mi25437-8010555-5810555-5826150(Top 92%)11125(Top 91%)11125(Top 1119%)
35K21.75 mi0.75 mi25398+3910544+1110544+1124388(Top 86%)10272(Top 84%)10272(Top 1033%)
23M23.00 mi1.25 mi25314+8410500+4410500+4423562(Top 83%)9883(Top 81%)9883(Top 994%)
24M24.00 mi1.00 mi25252+6210481+1910481+1923831(Top 84%)10040(Top 82%)10040(Top 1010%)
40K24.85 mi0.85 mi25198+5410451+3010451+3022974(Top 81%)9692(Top 79%)9692(Top 975%)
25.2M25.20 mi0.35 mi25210-1210467-1610467-1625862(Top 91%)11112(Top 91%)11112(Top 1118%)
Finish26.22 mi1.02 mi25208+210475-810475-824595(Top 87%)10457(Top 86%)10457(Top 1052%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 90%
×21story building
+97ft-345ft

Overall

25505

Females

10508

F55-59

10508

5K→10K

3.1 - 6.2 mi

Top 94%
×5story building
+79ft-138ft

Overall

26580

Females

11108

F55-59

11108

10K→15K

6.2 - 9.3 mi

Top 90%
×3story building
+67ft-78ft

Overall

25505

Females

10508

F55-59

10508

15K→20K

9.3 - 12.4 mi

Top 91%
×5story building
+106ft-86ft

Overall

25964

Females

10789

F55-59

10789

20K→Half

12.4 - 13.1 mi

Top 95%
×2story building
+19ft-37ft

Overall

27010

Females

11423

F55-59

11423

Half→25K

13.1 - 15.5 mi

Top 86%
×4story building
+66ft-88ft

Overall

24433

Females

9981

F55-59

9981

25K→30K

15.5 - 18.6 mi

Top 89%
×9story building
+181ft-148ft

Overall

25360

Females

10594

F55-59

10594

30K→20M

18.6 - 20.0 mi

Top 88%
×5story building
+64ft-50ft

Overall

24944

Females

10444

F55-59

10444

20M→21M

20.0 - 21.0 mi

Top 92%
×8story building
+106ft-24ft

Overall

26150

Females

11125

F55-59

11125

21M→35K

21.0 - 21.8 mi

Top 86%
×7story building
+17ft-86ft

Overall

24388

Females

10272

F55-59

10272

35K→23M

21.8 - 23.0 mi

Top 83%
×5story building
+23ft-63ft

Overall

23562

Females

9883

F55-59

9883

23M→24M

23.0 - 24.0 mi

Top 84%
×6story building
+12ft-82ft

Overall

23831

Females

10040

F55-59

10040

24M→40K

24.0 - 24.9 mi

Top 81%
×1story
+6ft-20ft

Overall

22974

Females

9692

F55-59

9692

40K→25.2M

24.9 - 25.2 mi

Top 91%
×1story
+13ft-16ft

Overall

25862

Females

11112

F55-59

11112

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2story building
+22ft-21ft

Overall

24595

Females

10457

F55-59

10457

Passing Analysis

Category:
Athletes Passed
908
Passed By
3721
Net Change
-2813
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22395
5K → 10K52675-2670#22395#25065
10K → 15K87256-169#25065#25234
15K → 20K61318-257#25234#25491
20K → Half3107-104#25491#25595
Half → 25K22820+208#25595#25387
25K → 30K122120+2#25387#25385
30K → 20M6840+28#25385#25357
20M → 21M21101-80#25357#25437
21M → 35K434+39#25437#25398
35K → 23M9814+84#25398#25314
23M → 24M7311+62#25314#25252
24M → 40K595+54#25252#25198
40K → 25.2M1224-12#25198#25210
25.2M → Finish2826+2#25210#25208
TOTALS9083721-2813
📊

Passing Visuals

Category:
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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