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BOSTON MARATHON 2025

Sylvia Tseng

TX

Bib: 19134 F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 35%
Gender (Female)
#0 / 12228
Top 18%
Division (F18-39)
#0 / 5469
Top 32%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:56/mi
24:39
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:43/mi
48:37
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:30/mi
1:11:56
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:25/mi
1:34:59
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:14/mi
1:39:55
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:27/mi
1:57:58
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:43/mi
2:21:55
↑ 181↓ 1480.2%
138 ft elev
20M
7:39/mi
2:32:19
↑ 64↓ 500.2%
148 ft elev
21M
8:05/mi
2:40:24
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:17/mi
2:45:51
↑ 17↓ 861.7%
156 ft elev
23M
7:51/mi
2:55:41
↑ 23↓ 630.6%
116 ft elev
24M
7:19/mi
3:03:00
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:30/mi
3:09:25
↓ 200.3%
20 ft elev
25.2M
8:25/mi
3:12:19
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:17/mi
3:19:44
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:39:55
Pace7:37 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:39:49
Pace7:37 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:0324:397:5624:39
7:56
-
10K
6.21 mi11:43:0148:377:4923:58
7:43
-0:13
15K
9.32 mi12:06:201:11:567:4323:19
7:30
-0:13
20K
12.43 mi12:29:231:34:597:3923:03
7:25
-0:05
Half
13.11 mi12:34:191:39:557:374:56
7:14
-0:11
25K
15.53 mi12:52:221:57:587:3618:03
7:27
+0:13
30K
18.64 mi13:16:192:21:557:3723:57
7:43
+0:16
20M
20.00 mi13:26:432:32:197:3710:24
7:39
-0:04
21M
21.00 mi13:34:482:40:247:388:05
8:05
+0:26
35K
21.75 mi13:40:152:45:517:385:27
7:17
-0:48
23M
23.00 mi13:50:052:55:417:389:50
7:51
+0:34
24M
24.00 mi13:57:243:03:007:387:19
7:19
-0:32
40K
24.85 mi14:03:493:09:257:376:25
7:30
+0:11
25.2M
25.20 mi14:06:433:12:197:382:54
8:25
+0:55
Finish
26.22 mi14:14:083:19:447:377:25
7:17
-1:08

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

7:14 /mi

Average Pace

7:37 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:08:45

95% of race

Time at Steady Pace

10:59

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:37 /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 mi11:19:0324:397:5624:39
7:56
#16047
10K
6.21 mi11:43:0148:377:4923:58
7:43
#14987
15K
9.32 mi12:06:201:11:567:4323:19
7:30
#13903
20K
12.43 mi12:29:231:34:597:3923:03
7:25
#12863
Half
13.11 mi12:34:191:39:557:374:56
7:14
#12681
25K
15.53 mi12:52:221:57:587:3618:03
7:27
#12123
30K
18.64 mi13:16:192:21:557:3723:57
7:43
#11536
20M
20.00 mi13:26:432:32:197:3710:24
7:39
#11220
21M
21.00 mi13:34:482:40:247:388:05
8:05
#10978
35K
21.75 mi13:40:152:45:517:385:27
7:17
#10815
23M
23.00 mi13:50:052:55:417:389:50
7:51
#10649
24M
24.00 mi13:57:243:03:007:387:19
7:19
#10436
40K
24.85 mi14:03:493:09:257:376:25
7:30
#10245
25.2M
25.20 mi14:06:433:12:197:382:54
8:25
#10187
Finish
26.22 mi14:14:083:19:447:377:25
7:17
#10063
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi160475168516811805(Top 42%)2799(Top 23%)2799(Top 51%)
10K6.21 mi3.10 mi14987+10604538+6304538+63014026(Top 49%)3966(Top 32%)3966(Top 73%)
15K9.32 mi3.11 mi13903+10843909+6293909+62911805(Top 42%)2799(Top 23%)2799(Top 51%)
20K12.43 mi3.11 mi12863+10403365+5443365+54410076(Top 35%)1995(Top 16%)1995(Top 36%)
Half13.11 mi0.68 mi12681+1823262+1033262+1039476(Top 33%)1719(Top 14%)1719(Top 31%)
25K15.53 mi2.42 mi12123+5582983+2792983+2799524(Top 34%)1891(Top 15%)1891(Top 35%)
30K18.64 mi3.11 mi11536+5872751+2322751+2329259(Top 33%)1948(Top 16%)1948(Top 36%)
20M20.00 mi1.36 mi11220+3162623+1282623+1288082(Top 28%)1576(Top 13%)1576(Top 29%)
21M21.00 mi1.00 mi10978+2422535+882535+887888(Top 28%)1685(Top 14%)1685(Top 31%)
35K21.75 mi0.75 mi10815+1632481+542481+547212(Top 25%)1389(Top 11%)1389(Top 25%)
23M23.00 mi1.25 mi10649+1662430+512430+518981(Top 32%)2247(Top 18%)2247(Top 41%)
24M24.00 mi1.00 mi10436+2132351+792351+796549(Top 23%)1283(Top 10%)1283(Top 23%)
40K24.85 mi0.85 mi10245+1912297+542297+546866(Top 24%)1506(Top 12%)1506(Top 28%)
25.2M25.20 mi0.35 mi10187+582287+102287+108333(Top 29%)2213(Top 18%)2213(Top 40%)
Finish26.22 mi1.02 mi10063+1242251+362251+367657(Top 27%)1929(Top 16%)1929(Top 35%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21story building
+97ft-345ft

Overall

11805

Females

2799

F18-39

2799

5K→10K

3.1 - 6.2 mi

Top 49%
×5story building
+79ft-138ft

Overall

14026

Females

3966

F18-39

3966

10K→15K

6.2 - 9.3 mi

Top 42%
×3story building
+67ft-78ft

Overall

11805

Females

2799

F18-39

2799

15K→20K

9.3 - 12.4 mi

Top 35%
×5story building
+106ft-86ft

Overall

10076

Females

1995

F18-39

1995

20K→Half

12.4 - 13.1 mi

Top 33%
×2story building
+19ft-37ft

Overall

9476

Females

1719

F18-39

1719

Half→25K

13.1 - 15.5 mi

Top 34%
×4story building
+66ft-88ft

Overall

9524

Females

1891

F18-39

1891

25K→30K

15.5 - 18.6 mi

Top 33%
×9story building
+181ft-148ft

Overall

9259

Females

1948

F18-39

1948

30K→20M

18.6 - 20.0 mi

Top 28%
×5story building
+64ft-50ft

Overall

8082

Females

1576

F18-39

1576

20M→21M

20.0 - 21.0 mi

Top 28%
×8story building
+106ft-24ft

Overall

7888

Females

1685

F18-39

1685

21M→35K

21.0 - 21.8 mi

Top 25%
×7story building
+17ft-86ft

Overall

7212

Females

1389

F18-39

1389

35K→23M

21.8 - 23.0 mi

Top 32%
×5story building
+23ft-63ft

Overall

8981

Females

2247

F18-39

2247

23M→24M

23.0 - 24.0 mi

Top 23%
×6story building
+12ft-82ft

Overall

6549

Females

1283

F18-39

1283

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6866

Females

1506

F18-39

1506

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

8333

Females

2213

F18-39

2213

25.2M→Finish

25.2 - 26.2 mi

Top 27%
×2story building
+22ft-21ft

Overall

7657

Females

1929

F18-39

1929

Passing Analysis

Category:
Athletes Passed
6146
Passed By
162
Net Change
+5984
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16047
5K → 10K110343+1060#16047#14987
10K → 15K10884+1084#14987#13903
15K → 20K10411+1040#13903#12863
20K → Half1831+182#12863#12681
Half → 25K5613+558#12681#12123
25K → 30K60215+587#12123#11536
30K → 20M3215+316#11536#11220
20M → 21M25614+242#11220#10978
21M → 35K1641+163#10978#10815
35K → 23M19428+166#10815#10649
23M → 24M2229+213#10649#10436
24M → 40K1932+191#10436#10245
40K → 25.2M7315+58#10245#10187
25.2M → Finish14521+124#10187#10063
TOTALS6146162+5984
📊

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