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BOSTON MARATHON 2025

Tammy Hsieh

Bib: 161•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 4%
Gender (Female)
#0 / 12228
Top 0.4%
Division (F18-39)
#0 / 5469
Top 0.8%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:43
Rank: #1149
Start → 5K
18:43 | 6:01/mi
10K· 6.21 mi
37:07
Rank: #1007 (+142)
5K → 10K
18:24 | 5:55/mi
15K· 9.32 mi
55:50
Rank: #1018 (-11)
10K → 15K
18:43 | 6:01/mi
20K· 12.43 mi
1:14:37
Rank: #1009 (+9)
15K → 20K
18:47 | 6:03/mi
Half· 13.11 mi
1:18:42
Rank: #1011 (-2)
20K → Half
4:05 | 5:59/mi
25K· 15.53 mi
1:33:23
Rank: #989 (+22)
Half → 25K
14:41 | 6:03/mi
30K· 18.64 mi
1:52:45
Rank: #959 (+30)
25K → 30K
19:22 | 6:14/mi
20M
2:01:24
Rank: #947 (+12)
30K → 20M
8:39 | 6:22/mi
21M
2:08:11
Rank: #960 (-13)
20M → 21M
6:47 | 6:47/mi
35K· 21.75 mi
2:12:53
Rank: #956 (+4)
21M → 35K
4:42 | 6:17/mi
23M
2:21:05
Rank: #963 (-7)
35K → 23M
8:12 | 6:33/mi
24M
2:27:27
Rank: #975 (-12)
23M → 24M
6:22 | 6:22/mi
40K· 24.85 mi
2:33:03
Rank: #980 (-5)
24M → 40K
5:36 | 6:33/mi
25.2M
2:35:32
Rank: #991 (-11)
40K → 25.2M
2:29 | 7:12/mi
Finish· 26.22 mi
2:42:03
Rank: #1007 (-16)
25.2M → Finish
6:31 | 6:24/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:18:42
Pace6:00 /mi
2nd Half
Distance13.11 mi
Time1:23:21
Pace6:21 /mi
📊Positive Split: 5.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:05:4418:436:0118:43
6:01
-
10K
6.21 mi10:24:0837:075:5818:24
5:55
-0:06
15K
9.32 mi10:42:5155:505:5918:43
6:01
+0:06
20K
12.43 mi11:01:381:14:376:0018:47
6:03
+0:02
Half
13.11 mi11:05:431:18:426:004:05
5:59
-0:04
25K
15.53 mi11:20:241:33:236:0114:41
6:03
+0:04
30K
18.64 mi11:39:461:52:456:0319:22
6:14
+0:11
20M
20.00 mi11:48:252:01:246:048:39
6:22
+0:08
21M
21.00 mi11:55:122:08:116:066:47
6:47
+0:25
35K
21.75 mi11:59:542:12:536:074:42
6:17
-0:30
23M
23.00 mi12:08:062:21:056:088:12
6:33
+0:16
24M
24.00 mi12:14:282:27:276:096:22
6:22
-0:11
40K
24.85 mi12:20:042:33:036:095:36
6:33
+0:11
25.2M
25.20 mi12:22:332:35:326:102:29
7:12
+0:39
Finish
26.22 mi12:29:042:42:036:116:31
6:24
-0:48

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

5:55 /mi

Average Pace

6:11 /mi

Slowest Pace

7:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:33:23

58% of race

Time at Steady Pace

45:36

28% of race

Time at Slower Pace

23:04

14% of race

Average Pace: 6:11 /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 mi10:05:4418:436:0118:43
6:01
#1149
10K
6.21 mi10:24:0837:075:5818:24
5:55
#1007
15K
9.32 mi10:42:5155:505:5918:43
6:01
#1018
20K
12.43 mi11:01:381:14:376:0018:47
6:03
#1009
Half
13.11 mi11:05:431:18:426:004:05
5:59
#1011
25K
15.53 mi11:20:241:33:236:0114:41
6:03
#989
30K
18.64 mi11:39:461:52:456:0319:22
6:14
#959
20M
20.00 mi11:48:252:01:246:048:39
6:22
#947
21M
21.00 mi11:55:122:08:116:066:47
6:47
#960
35K
21.75 mi11:59:542:12:536:074:42
6:17
#956
23M
23.00 mi12:08:062:21:056:088:12
6:33
#963
24M
24.00 mi12:14:282:27:276:096:22
6:22
#975
40K
24.85 mi12:20:042:33:036:095:36
6:33
#980
25.2M
25.20 mi12:22:332:35:326:102:29
7:12
#991
Finish
26.22 mi12:29:042:42:036:116:31
6:24
#1007
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi114957571119(Top 4%)56(Top 0.5%)56(Top 1%)
10K6.21 mi3.10 mi1007+14255+255+2893(Top 3%)50(Top 0.4%)50(Top 0.9%)
15K9.32 mi3.11 mi1018-1154+154+11119(Top 4%)56(Top 0.5%)56(Top 1%)
20K12.43 mi3.11 mi1009+955-155-1993(Top 3%)53(Top 0.4%)53(Top 1.0%)
Half13.11 mi0.68 mi1011-254+154+11136(Top 4%)56(Top 0.5%)56(Top 1%)
25K15.53 mi2.42 mi989+2253+153+1957(Top 3%)51(Top 0.4%)51(Top 0.9%)
30K18.64 mi3.11 mi959+3052+152+11024(Top 4%)56(Top 0.5%)56(Top 1%)
20M20.00 mi1.36 mi947+1253-153-11152(Top 4%)60(Top 0.5%)60(Top 1%)
21M21.00 mi1.00 mi960-1352+152+11498(Top 5%)77(Top 0.6%)77(Top 1%)
35K21.75 mi0.75 mi956+452521572(Top 6%)86(Top 0.7%)86(Top 2%)
23M23.00 mi1.25 mi963-753-153-11655(Top 6%)101(Top 0.8%)101(Top 2%)
24M24.00 mi1.00 mi975-1253531565(Top 6%)94(Top 0.8%)94(Top 2%)
40K24.85 mi0.85 mi980-553531818(Top 6%)129(Top 1%)129(Top 2%)
25.2M25.20 mi0.35 mi991-1154-154-12210(Top 8%)203(Top 2%)203(Top 4%)
Finish26.22 mi1.02 mi1007-1655-155-12320(Top 8%)190(Top 2%)190(Top 3%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21stories
+97ft-345ft

Overall

1119

Females

56

F18-39

56

5K→10K

3.1 - 6.2 mi

Top 3%
×5stories
+79ft-138ft

Overall

893

Females

50

F18-39

50

10K→15K

6.2 - 9.3 mi

Top 4%
×3stories
+67ft-78ft

Overall

1119

Females

56

F18-39

56

15K→20K

9.3 - 12.4 mi

Top 3%
×5stories
+106ft-86ft

Overall

993

Females

53

F18-39

53

20K→Half

12.4 - 13.1 mi

Top 4%
×2stories
+19ft-37ft

Overall

1136

Females

56

F18-39

56

Half→25K

13.1 - 15.5 mi

Top 3%
×4stories
+66ft-88ft

Overall

957

Females

51

F18-39

51

25K→30K

15.5 - 18.6 mi

Top 4%
×9stories
+181ft-148ft

Overall

1024

Females

56

F18-39

56

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

1152

Females

60

F18-39

60

20M→21M

20.0 - 21.0 mi

Top 5%
×8stories
+106ft-24ft

Overall

1498

Females

77

F18-39

77

21M→35K

21.0 - 21.8 mi

Top 6%
×7stories
+17ft-86ft

Overall

1572

Females

86

F18-39

86

35K→23M

21.8 - 23.0 mi

Top 6%
×5stories
+23ft-63ft

Overall

1655

Females

101

F18-39

101

23M→24M

23.0 - 24.0 mi

Top 6%
×6stories
+12ft-82ft

Overall

1565

Females

94

F18-39

94

24M→40K

24.0 - 24.9 mi

Top 6%
×1story
+6ft-20ft

Overall

1818

Females

129

F18-39

129

40K→25.2M

24.9 - 25.2 mi

Top 8%
×1story
+13ft-16ft

Overall

2210

Females

203

F18-39

203

25.2M→Finish

25.2 - 26.2 mi

Top 8%
×2stories
+22ft-21ft

Overall

2320

Females

190

F18-39

190

Passing Analysis

Category:
Athletes Passed
436
Passed By
294
Net Change
+142
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1149
5K → 10K1508+142#1149#1007
10K → 15K2435-11#1007#1018
15K → 20K3425+9#1018#1009
20K → Half79-2#1009#1011
Half → 25K3715+22#1011#989
25K → 30K5525+30#989#959
30K → 20M3422+12#959#947
20M → 21M1730-13#947#960
21M → 35K1915+4#960#956
35K → 23M2330-7#956#963
23M → 24M1022-12#963#975
24M → 40K1217-5#975#980
40K → 25.2M516-11#980#991
25.2M → Finish925-16#991#1007
TOTALS436294+142
📊

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