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BOSTON MARATHON 2025

Jennifer Hou

Bib: 19007•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 41%
Gender (Female)
#0 / 12228
Top 25%
Masters (Masters Women)
#0 / 6759
Top 11%
Division (F40-44)
#0 / 1718
Top 24%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:49
Rank: #8017
Start → 5K
21:49 | 7:01/mi
10K· 6.21 mi
43:46
Rank: #8215 (-198)
5K → 10K
21:57 | 7:04/mi
15K· 9.32 mi
1:06:36
Rank: #8892 (-677)
10K → 15K
22:50 | 7:21/mi
20K· 12.43 mi
1:30:12
Rank: #9494 (-602)
15K → 20K
23:36 | 7:36/mi
Half· 13.11 mi
1:35:15
Rank: #9562 (-68)
20K → Half
5:03 | 7:24/mi
25K· 15.53 mi
1:54:06
Rank: #9959 (-397)
Half → 25K
18:51 | 7:46/mi
30K· 18.64 mi
2:19:25
Rank: #10402 (-443)
25K → 30K
25:19 | 8:09/mi
20M
2:31:04
Rank: #10723 (-321)
30K → 20M
11:39 | 8:34/mi
21M
2:40:41
Rank: #11088 (-365)
20M → 21M
9:37 | 9:37/mi
35K· 21.75 mi
2:46:47
Rank: #11156 (-68)
21M → 35K
6:06 | 8:09/mi
23M
2:57:35
Rank: #11312 (-156)
35K → 23M
10:48 | 8:38/mi
24M
3:05:48
Rank: #11339 (-27)
23M → 24M
8:13 | 8:13/mi
40K· 24.85 mi
3:13:08
Rank: #11447 (-108)
24M → 40K
7:20 | 8:35/mi
25.2M
3:16:24
Rank: #11483 (-36)
40K → 25.2M
3:16 | 9:28/mi
Finish· 26.22 mi
3:24:43
Rank: #11594 (-111)
25.2M → Finish
8:19 | 8:10/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:15
Pace7:16 /mi
2nd Half
Distance13.11 mi
Time1:49:28
Pace8:21 /mi
📊Positive Split: 14.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:12:3321:497:0121:49
7:01
-
10K
6.21 mi11:34:3043:467:0321:57
7:04
+0:03
15K
9.32 mi11:57:201:06:367:0922:50
7:21
+0:17
20K
12.43 mi12:20:561:30:127:1523:36
7:36
+0:15
Half
13.11 mi12:25:591:35:157:165:03
7:24
-0:12
25K
15.53 mi12:44:501:54:067:2118:51
7:46
+0:22
30K
18.64 mi13:10:092:19:257:2925:19
8:09
+0:23
20M
20.00 mi13:21:482:31:047:3311:39
8:34
+0:25
21M
21.00 mi13:31:252:40:417:399:37
9:37
+1:03
35K
21.75 mi13:37:312:46:477:406:06
8:09
-1:28
23M
23.00 mi13:48:192:57:357:4310:48
8:38
+0:29
24M
24.00 mi13:56:323:05:487:458:13
8:13
-0:25
40K
24.85 mi14:03:523:13:087:467:20
8:35
+0:22
25.2M
25.20 mi14:07:083:16:247:483:16
9:28
+0:53
Finish
26.22 mi14:15:273:24:437:498:19
8:10
-1:18

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

7:01 /mi

Average Pace

7:49 /mi

Slowest Pace

9:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:54:06

56% of race

Time at Steady Pace

47:57

23% of race

Time at Slower Pace

42:40

21% of race

Average Pace: 7:48 /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 mi11:12:3321:497:0121:49
7:01
#8017
10K
6.21 mi11:34:3043:467:0321:57
7:04
#8215
15K
9.32 mi11:57:201:06:367:0922:50
7:21
#8892
20K
12.43 mi12:20:561:30:127:1523:36
7:36
#9494
Half
13.11 mi12:25:591:35:157:165:03
7:24
#9562
25K
15.53 mi12:44:501:54:067:2118:51
7:46
#9959
30K
18.64 mi13:10:092:19:257:2925:19
8:09
#10402
20M
20.00 mi13:21:482:31:047:3311:39
8:34
#10723
21M
21.00 mi13:31:252:40:417:399:37
9:37
#11088
35K
21.75 mi13:37:312:46:477:406:06
8:09
#11156
23M
23.00 mi13:48:192:57:357:4310:48
8:38
#11312
24M
24.00 mi13:56:323:05:487:458:13
8:13
#11339
40K
24.85 mi14:03:523:13:087:467:20
8:35
#11447
25.2M
25.20 mi14:07:083:16:247:483:16
9:28
#11483
Finish
26.22 mi14:15:273:24:437:498:19
8:10
#11594
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi801799299210423(Top 37%)2085(Top 17%)2085(Top 121%)
10K6.21 mi3.10 mi8215-1981074-821074-828408(Top 30%)1152(Top 9%)1152(Top 67%)
15K9.32 mi3.11 mi8892-6771352-2781352-27810423(Top 37%)2085(Top 17%)2085(Top 121%)
20K12.43 mi3.11 mi9494-6021639-2871639-28711594(Top 41%)2785(Top 23%)2785(Top 162%)
Half13.11 mi0.68 mi9562-681676-371676-3710988(Top 39%)2430(Top 20%)2430(Top 141%)
25K15.53 mi2.42 mi9959-3971883-2071883-20712144(Top 43%)3186(Top 26%)3186(Top 185%)
30K18.64 mi3.11 mi10402-4432155-2722155-27212431(Top 44%)3516(Top 29%)3516(Top 205%)
20M20.00 mi1.36 mi10723-3212370-2152370-21514258(Top 50%)4632(Top 38%)4632(Top 270%)
21M21.00 mi1.00 mi11088-3652592-2222592-22216627(Top 59%)6037(Top 49%)6037(Top 351%)
35K21.75 mi0.75 mi11156-682656-642656-6413313(Top 47%)4312(Top 35%)4312(Top 251%)
23M23.00 mi1.25 mi11312-1562780-1242780-12414094(Top 50%)4838(Top 40%)4838(Top 282%)
24M24.00 mi1.00 mi11339-272835-552835-5512696(Top 45%)4151(Top 34%)4151(Top 242%)
40K24.85 mi0.85 mi11447-1082931-962931-9613934(Top 49%)4920(Top 40%)4920(Top 286%)
25.2M25.20 mi0.35 mi11483-362958-272958-2714452(Top 51%)5241(Top 43%)5241(Top 305%)
Finish26.22 mi1.02 mi11594-1113052-943052-9414017(Top 49%)4948(Top 40%)4948(Top 288%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21stories
+97ft-345ft

Overall

10423

Females

2085

F40-44

2085

5K→10K

3.1 - 6.2 mi

Top 30%
×5stories
+79ft-138ft

Overall

8408

Females

1152

F40-44

1152

10K→15K

6.2 - 9.3 mi

Top 37%
×3stories
+67ft-78ft

Overall

10423

Females

2085

F40-44

2085

15K→20K

9.3 - 12.4 mi

Top 41%
×5stories
+106ft-86ft

Overall

11594

Females

2785

F40-44

2785

20K→Half

12.4 - 13.1 mi

Top 39%
×2stories
+19ft-37ft

Overall

10988

Females

2430

F40-44

2430

Half→25K

13.1 - 15.5 mi

Top 43%
×4stories
+66ft-88ft

Overall

12144

Females

3186

F40-44

3186

25K→30K

15.5 - 18.6 mi

Top 44%
×9stories
+181ft-148ft

Overall

12431

Females

3516

F40-44

3516

30K→20M

18.6 - 20.0 mi

Top 50%
×5stories
+64ft-50ft

Overall

14258

Females

4632

F40-44

4632

20M→21M

20.0 - 21.0 mi

Top 59%
×8stories
+106ft-24ft

Overall

16627

Females

6037

F40-44

6037

21M→35K

21.0 - 21.8 mi

Top 47%
×7stories
+17ft-86ft

Overall

13313

Females

4312

F40-44

4312

35K→23M

21.8 - 23.0 mi

Top 50%
×5stories
+23ft-63ft

Overall

14094

Females

4838

F40-44

4838

23M→24M

23.0 - 24.0 mi

Top 45%
×6stories
+12ft-82ft

Overall

12696

Females

4151

F40-44

4151

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

13934

Females

4920

F40-44

4920

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

14452

Females

5241

F40-44

5241

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2stories
+22ft-21ft

Overall

14017

Females

4948

F40-44

4948

Passing Analysis

Category:
Athletes Passed
812
Passed By
4387
Net Change
-3577
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8017
5K → 10K136334-198#8017#8215
10K → 15K38715-677#8215#8892
15K → 20K58660-602#8892#9494
20K → Half1482-68#9494#9562
Half → 25K67464-397#9562#9959
25K → 30K119560-443#9959#10402
30K → 20M51372-321#10402#10723
20M → 21M30395-365#10723#11088
21M → 35K38106-68#11088#11156
35K → 23M66222-156#11156#11312
23M → 24M76103-27#11312#11339
24M → 40K43151-108#11339#11447
40K → 25.2M2561-36#11447#11483
25.2M → Finish51162-111#11483#11594
TOTALS8124387-3577
📊

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