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BOSTON MARATHON 2025

Miae Chang

Bib: 21969•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 43%
Gender (Female)
#0 / 12228
Top 27%
Masters (Masters Women)
#0 / 6759
Top 12%
Division (F50-54)
#0 / 1303
Top 7%
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
7:43/mi
23:58
↑ 97↓ 3451.5%
10K· 6.21 mi
7:44/mi
48:01
↑ 79↓ 1380.4%
15K· 9.32 mi
7:45/mi
1:12:05
↑ 67↓ 78
20K· 12.43 mi
7:47/mi
1:36:17
↑ 106↓ 860.1%
Half· 13.11 mi
7:37/mi
1:41:29
↑ 19↓ 370.5%
25K· 15.53 mi
7:48/mi
2:00:24
↑ 66↓ 880.2%
30K· 18.64 mi
8:02/mi
2:25:21
↑ 181↓ 1480.2%
20M
8:18/mi
2:36:38
↑ 64↓ 500.2%
21M
8:58/mi
2:45:36
↑ 106↓ 241.6%
35K· 21.75 mi
7:37/mi
2:51:18
↑ 17↓ 861.7%
23M
7:53/mi
3:01:10
↑ 23↓ 630.6%
24M
7:32/mi
3:08:42
↓ 821.3%
40K· 24.85 mi
7:49/mi
3:15:23
↓ 200.3%
25.2M
9:02/mi
3:18:30
↑ 13↓ 160.2%
Finish· 26.22 mi
7:47/mi
3:26:26
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:29
Pace7:44 /mi
2nd Half
Distance13.11 mi
Time1:44:57
Pace8:00 /mi
📊Positive Split: 3.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:2323:587:4323:58
7:43
-
10K
6.21 mi11:42:2648:017:4424:03
7:44
+0:01
15K
9.32 mi12:06:301:12:057:4424:04
7:45
+0:01
20K
12.43 mi12:30:421:36:177:4524:12
7:47
+0:02
Half
13.11 mi12:35:541:41:297:445:12
7:37
-0:10
25K
15.53 mi12:54:492:00:247:4518:55
7:48
+0:11
30K
18.64 mi13:19:462:25:217:4824:57
8:02
+0:14
20M
20.00 mi13:31:032:36:387:5011:17
8:18
+0:16
21M
21.00 mi13:40:012:45:367:538:58
8:58
+0:40
35K
21.75 mi13:45:432:51:187:535:42
7:37
-1:21
23M
23.00 mi13:55:353:01:107:539:52
7:53
+0:16
24M
24.00 mi14:03:073:08:427:527:32
7:32
-0:21
40K
24.85 mi14:09:483:15:237:526:41
7:49
+0:17
25.2M
25.20 mi14:12:553:18:307:533:07
9:02
+1:13
Finish
26.22 mi14:20:513:26:267:537:56
7:47
-1:15

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

7:32 /mi

Average Pace

7:53 /mi

Slowest Pace

9:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:03:04

89% of race

Time at Steady Pace

11:17

5% of race

Time at Slower Pace

12:05

6% of race

Average Pace: 7:52 /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 mi11:18:2323:587:4323:58
7:43
#14100
10K
6.21 mi11:42:2648:017:4424:03
7:44
#14130
15K
9.32 mi12:06:301:12:057:4424:04
7:45
#14056
20K
12.43 mi12:30:421:36:177:4524:12
7:47
#13783
Half
13.11 mi12:35:541:41:297:445:12
7:37
#13724
25K
15.53 mi12:54:492:00:247:4518:55
7:48
#13441
30K
18.64 mi13:19:462:25:217:4824:57
8:02
#13059
20M
20.00 mi13:31:032:36:387:5011:17
8:18
#12993
21M
21.00 mi13:40:012:45:367:538:58
8:58
#12968
35K
21.75 mi13:45:432:51:187:535:42
7:37
#12848
23M
23.00 mi13:55:353:01:107:539:52
7:53
#12577
24M
24.00 mi14:03:073:08:427:527:32
7:32
#12344
40K
24.85 mi14:09:483:15:237:526:41
7:49
#12189
25.2M
25.20 mi14:12:553:18:307:533:07
9:02
#12177
Finish
26.22 mi14:20:513:26:267:537:56
7:47
#12120
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi141003971397113910(Top 49%)3956(Top 32%)3956(Top 304%)
10K6.21 mi3.10 mi14130-304012-414012-4114265(Top 50%)4111(Top 34%)4111(Top 316%)
15K9.32 mi3.11 mi14056+744007+54007+513910(Top 49%)3956(Top 32%)3956(Top 304%)
20K12.43 mi3.11 mi13783+2733887+1203887+12013199(Top 46%)3652(Top 30%)3652(Top 280%)
Half13.11 mi0.68 mi13724+593868+193868+1912812(Top 45%)3391(Top 28%)3391(Top 260%)
25K15.53 mi2.42 mi13441+2833734+1343734+13412387(Top 44%)3327(Top 27%)3327(Top 255%)
30K18.64 mi3.11 mi13059+3823586+1483586+14811623(Top 41%)3107(Top 25%)3107(Top 238%)
20M20.00 mi1.36 mi12993+663576+103576+1012516(Top 44%)3699(Top 30%)3699(Top 284%)
21M21.00 mi1.00 mi12968+253593-173593-1713312(Top 47%)4265(Top 35%)4265(Top 327%)
35K21.75 mi0.75 mi12848+1203542+513542+519545(Top 34%)2400(Top 20%)2400(Top 184%)
23M23.00 mi1.25 mi12577+2713438+1043438+1049196(Top 32%)2357(Top 19%)2357(Top 181%)
24M24.00 mi1.00 mi12344+2333348+903348+907993(Top 28%)1878(Top 15%)1878(Top 144%)
40K24.85 mi0.85 mi12189+1553305+433305+438936(Top 31%)2433(Top 20%)2433(Top 187%)
25.2M25.20 mi0.35 mi12177+123312-73312-712051(Top 42%)3992(Top 33%)3992(Top 306%)
Finish26.22 mi1.02 mi12120+573305+73305+711346(Top 40%)3632(Top 30%)3632(Top 279%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 49%
×21story building
+97ft-345ft

Overall

13910

Females

3956

F50-54

3956

5K→10K

3.1 - 6.2 mi

Top 50%
×5story building
+79ft-138ft

Overall

14265

Females

4111

F50-54

4111

10K→15K

6.2 - 9.3 mi

Top 49%
×3story building
+67ft-78ft

Overall

13910

Females

3956

F50-54

3956

15K→20K

9.3 - 12.4 mi

Top 46%
×5story building
+106ft-86ft

Overall

13199

Females

3652

F50-54

3652

20K→Half

12.4 - 13.1 mi

Top 45%
×2story building
+19ft-37ft

Overall

12812

Females

3391

F50-54

3391

Half→25K

13.1 - 15.5 mi

Top 44%
×4story building
+66ft-88ft

Overall

12387

Females

3327

F50-54

3327

25K→30K

15.5 - 18.6 mi

Top 41%
×9story building
+181ft-148ft

Overall

11623

Females

3107

F50-54

3107

30K→20M

18.6 - 20.0 mi

Top 44%
×5story building
+64ft-50ft

Overall

12516

Females

3699

F50-54

3699

20M→21M

20.0 - 21.0 mi

Top 47%
×8story building
+106ft-24ft

Overall

13312

Females

4265

F50-54

4265

21M→35K

21.0 - 21.8 mi

Top 34%
×7story building
+17ft-86ft

Overall

9545

Females

2400

F50-54

2400

35K→23M

21.8 - 23.0 mi

Top 32%
×5story building
+23ft-63ft

Overall

9196

Females

2357

F50-54

2357

23M→24M

23.0 - 24.0 mi

Top 28%
×6story building
+12ft-82ft

Overall

7993

Females

1878

F50-54

1878

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8936

Females

2433

F50-54

2433

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1story
+13ft-16ft

Overall

12051

Females

3992

F50-54

3992

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2story building
+22ft-21ft

Overall

11346

Females

3632

F50-54

3632

Passing Analysis

Category:
Athletes Passed
2879
Passed By
899
Net Change
+1980
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14100
5K → 10K245275-30#14100#14130
10K → 15K241167+74#14130#14056
15K → 20K34875+273#14056#13783
20K → Half6910+59#13783#13724
Half → 25K31027+283#13724#13441
25K → 30K46684+382#13441#13059
30K → 20M14882+66#13059#12993
20M → 21M11287+25#12993#12968
21M → 35K1266+120#12968#12848
35K → 23M2776+271#12848#12577
23M → 24M2385+233#12577#12344
24M → 40K1649+155#12344#12189
40K → 25.2M3927+12#12189#12177
25.2M → Finish9639+57#12177#12120
TOTALS2879899+1980
📊

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