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BOSTON MARATHON 2025

Joy Chiong

Bib: 21557•F

NJ

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F45-49)
#0 / 1813
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
8:46/mi
27:15
↑ 97↓ 3451.5%
10K· 6.21 mi
8:40/mi
54:10
↑ 79↓ 1380.4%
15K· 9.32 mi
8:40/mi
1:21:07
↑ 67↓ 78
20K· 12.43 mi
8:46/mi
1:48:22
↑ 106↓ 860.1%
Half· 13.11 mi
8:40/mi
1:54:17
↑ 19↓ 370.5%
25K· 15.53 mi
8:55/mi
2:15:54
↑ 66↓ 880.2%
30K· 18.64 mi
9:26/mi
2:45:13
↑ 181↓ 1480.2%
20M
9:40/mi
2:58:21
↑ 64↓ 500.2%
21M
10:15/mi
3:08:36
↑ 106↓ 241.6%
35K· 21.75 mi
9:28/mi
3:15:41
↑ 17↓ 861.7%
23M
9:20/mi
3:27:22
↑ 23↓ 630.6%
24M
9:17/mi
3:36:39
↓ 821.3%
40K· 24.85 mi
9:39/mi
3:44:54
↓ 200.3%
25.2M
11:07/mi
3:48:44
↑ 13↓ 160.2%
Finish· 26.22 mi
9:08/mi
3:58:02
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:17
Pace8:43 /mi
2nd Half
Distance13.11 mi
Time2:03:45
Pace9:26 /mi
📊Positive Split: 8.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:4627:158:4627:15
8:46
-
10K
6.21 mi11:51:4154:108:4326:55
8:40
-0:06
15K
9.32 mi12:18:381:21:078:4226:57
8:40
0:00
20K
12.43 mi12:45:531:48:228:4327:15
8:46
+0:06
Half
13.11 mi12:51:481:54:178:435:55
8:40
-0:06
25K
15.53 mi13:13:252:15:548:4521:37
8:55
+0:15
30K
18.64 mi13:42:442:45:138:5229:19
9:26
+0:31
20M
20.00 mi13:55:522:58:218:5513:08
9:40
+0:14
21M
21.00 mi14:06:073:08:368:5910:15
10:15
+0:35
35K
21.75 mi14:13:123:15:419:007:05
9:28
-0:47
23M
23.00 mi14:24:533:27:229:0111:41
9:20
-0:08
24M
24.00 mi14:34:103:36:399:029:17
9:17
-0:03
40K
24.85 mi14:42:253:44:549:038:15
9:39
+0:22
25.2M
25.20 mi14:46:153:48:449:053:50
11:07
+1:28
Finish
26.22 mi14:55:333:58:029:059:18
9:08
-1:59

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

8:40 /mi

Average Pace

9:05 /mi

Slowest Pace

11:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:15:54

57% of race

Time at Steady Pace

1:06:40

28% of race

Time at Slower Pace

35:28

15% of race

Average Pace: 9:05 /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 mi11:24:4627:158:4627:15
8:46
#21362
10K
6.21 mi11:51:4154:108:4326:55
8:40
#20993
15K
9.32 mi12:18:381:21:078:4226:57
8:40
#20764
20K
12.43 mi12:45:531:48:228:4327:15
8:46
#20532
Half
13.11 mi12:51:481:54:178:435:55
8:40
#20511
25K
15.53 mi13:13:252:15:548:4521:37
8:55
#20351
30K
18.64 mi13:42:442:45:138:5229:19
9:26
#20199
20M
20.00 mi13:55:522:58:218:5513:08
9:40
#20162
21M
21.00 mi14:06:073:08:368:5910:15
10:15
#20094
35K
21.75 mi14:13:123:15:419:007:05
9:28
#20110
23M
23.00 mi14:24:533:27:229:0111:41
9:20
#19999
24M
24.00 mi14:34:103:36:399:029:17
9:17
#19936
40K
24.85 mi14:42:253:44:549:038:15
9:39
#19917
25.2M
25.20 mi14:46:153:48:449:053:50
11:07
#19938
Finish
26.22 mi14:55:333:58:029:059:18
9:08
#19940
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi213628274827420338(Top 72%)7621(Top 62%)7621(Top 420%)
10K6.21 mi3.10 mi20993+3698050+2248050+22420689(Top 73%)7854(Top 64%)7854(Top 433%)
15K9.32 mi3.11 mi20764+2297904+1467904+14620338(Top 72%)7621(Top 62%)7621(Top 420%)
20K12.43 mi3.11 mi20532+2327778+1267778+12619804(Top 70%)7375(Top 60%)7375(Top 407%)
Half13.11 mi0.68 mi20511+217768+107768+1020247(Top 71%)7620(Top 62%)7620(Top 420%)
25K15.53 mi2.42 mi20351+1607687+817687+8119507(Top 69%)7265(Top 59%)7265(Top 401%)
30K18.64 mi3.11 mi20199+1527637+507637+5019691(Top 69%)7496(Top 61%)7496(Top 413%)
20M20.00 mi1.36 mi20162+377646-97646-919831(Top 70%)7689(Top 63%)7689(Top 424%)
21M21.00 mi1.00 mi20094+687634+127634+1219210(Top 68%)7445(Top 61%)7445(Top 411%)
35K21.75 mi0.75 mi20110-167652-187652-1820241(Top 71%)8099(Top 66%)8099(Top 447%)
23M23.00 mi1.25 mi19999+1117616+367616+3617955(Top 63%)6970(Top 57%)6970(Top 384%)
24M24.00 mi1.00 mi19936+637612+47612+418767(Top 66%)7424(Top 61%)7424(Top 409%)
40K24.85 mi0.85 mi19917+197612761219287(Top 68%)7778(Top 64%)7778(Top 429%)
25.2M25.20 mi0.35 mi19938-217633-217633-2121012(Top 74%)8656(Top 71%)8656(Top 477%)
Finish26.22 mi1.02 mi19940-27653-207653-2019649(Top 69%)7946(Top 65%)7946(Top 438%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21story building
+97ft-345ft

Overall

20338

Females

7621

F45-49

7621

5K→10K

3.1 - 6.2 mi

Top 73%
×5story building
+79ft-138ft

Overall

20689

Females

7854

F45-49

7854

10K→15K

6.2 - 9.3 mi

Top 72%
×3story building
+67ft-78ft

Overall

20338

Females

7621

F45-49

7621

15K→20K

9.3 - 12.4 mi

Top 70%
×5story building
+106ft-86ft

Overall

19804

Females

7375

F45-49

7375

20K→Half

12.4 - 13.1 mi

Top 71%
×2story building
+19ft-37ft

Overall

20247

Females

7620

F45-49

7620

Half→25K

13.1 - 15.5 mi

Top 69%
×4story building
+66ft-88ft

Overall

19507

Females

7265

F45-49

7265

25K→30K

15.5 - 18.6 mi

Top 69%
×9story building
+181ft-148ft

Overall

19691

Females

7496

F45-49

7496

30K→20M

18.6 - 20.0 mi

Top 70%
×5story building
+64ft-50ft

Overall

19831

Females

7689

F45-49

7689

20M→21M

20.0 - 21.0 mi

Top 68%
×8story building
+106ft-24ft

Overall

19210

Females

7445

F45-49

7445

21M→35K

21.0 - 21.8 mi

Top 71%
×7story building
+17ft-86ft

Overall

20241

Females

8099

F45-49

8099

35K→23M

21.8 - 23.0 mi

Top 63%
×5story building
+23ft-63ft

Overall

17955

Females

6970

F45-49

6970

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

18767

Females

7424

F45-49

7424

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

19287

Females

7778

F45-49

7778

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

21012

Females

8656

F45-49

8656

25.2M→Finish

25.2 - 26.2 mi

Top 69%
×2story building
+22ft-21ft

Overall

19649

Females

7946

F45-49

7946

Passing Analysis

Category:
Athletes Passed
2397
Passed By
975
Net Change
+1422
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21362
5K → 10K509140+369#21362#20993
10K → 15K31586+229#20993#20764
15K → 20K30573+232#20764#20532
20K → Half5029+21#20532#20511
Half → 25K22969+160#20511#20351
25K → 30K302150+152#20351#20199
30K → 20M11679+37#20199#20162
20M → 21M13062+68#20162#20094
21M → 35K5268-16#20094#20110
35K → 23M13928+111#20110#19999
23M → 24M9431+63#19999#19936
24M → 40K7152+19#19936#19917
40K → 25.2M2041-21#19917#19938
25.2M → Finish6567-2#19938#19940
TOTALS2397975+1422
📊

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