Boston Marathon logo
BOSTON MARATHON 2025

Tanghsi Chen

Bib: 14771•F

NJ

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
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
8:11/mi
25:27
↑ 97↓ 3451.5%
10K· 6.21 mi
8:23/mi
51:30
↑ 79↓ 1380.4%
15K· 9.32 mi
8:32/mi
1:18:01
↑ 67↓ 78
20K· 12.43 mi
8:42/mi
1:45:03
↑ 106↓ 860.1%
Half· 13.11 mi
8:27/mi
1:50:49
↑ 19↓ 370.5%
25K· 15.53 mi
8:47/mi
2:12:07
↑ 66↓ 880.2%
30K· 18.64 mi
9:07/mi
2:40:27
↑ 181↓ 1480.2%
20M
9:16/mi
2:53:03
↑ 64↓ 500.2%
21M
9:40/mi
3:02:43
↑ 106↓ 241.6%
35K· 21.75 mi
9:41/mi
3:09:58
↑ 17↓ 861.7%
23M
9:05/mi
3:21:21
↑ 23↓ 630.6%
24M
8:42/mi
3:30:03
↓ 821.3%
40K· 24.85 mi
8:38/mi
3:37:26
↓ 200.3%
25.2M
9:46/mi
3:40:48
↑ 13↓ 160.2%
Finish· 26.22 mi
7:47/mi
3:48:44
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:49
Pace8:27 /mi
2nd Half
Distance13.11 mi
Time1:57:55
Pace9:00 /mi
📊Positive Split: 6.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:4225:278:1125:27
8:11
-
10K
6.21 mi11:41:4551:308:1726:03
8:23
+0:12
15K
9.32 mi12:08:161:18:018:2226:31
8:32
+0:09
20K
12.43 mi12:35:181:45:038:2727:02
8:42
+0:10
Half
13.11 mi12:41:041:50:498:275:46
8:27
-0:15
25K
15.53 mi13:02:222:12:078:3021:18
8:47
+0:20
30K
18.64 mi13:30:422:40:278:3628:20
9:07
+0:20
20M
20.00 mi13:43:182:53:038:3912:36
9:16
+0:09
21M
21.00 mi13:52:583:02:438:429:40
9:40
+0:24
35K
21.75 mi14:00:133:09:588:447:15
9:41
+0:01
23M
23.00 mi14:11:363:21:218:4511:23
9:05
-0:36
24M
24.00 mi14:20:183:30:038:458:42
8:42
-0:23
40K
24.85 mi14:27:413:37:268:457:23
8:38
-0:04
25.2M
25.20 mi14:31:033:40:488:463:22
9:46
+1:08
Finish
26.22 mi14:38:593:48:448:447:56
7:47
-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

7:47 /mi

Average Pace

8:44 /mi

Slowest Pace

9:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

59:26

26% of race

Time at Steady Pace

1:36:42

42% of race

Time at Slower Pace

1:12:36

32% of race

Average Pace: 8:43 /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 mi11:15:4225:278:1125:27
8:11
#18035
10K
6.21 mi11:41:4551:308:1726:03
8:23
#18524
15K
9.32 mi12:08:161:18:018:2226:31
8:32
#18850
20K
12.43 mi12:35:181:45:038:2727:02
8:42
#18967
Half
13.11 mi12:41:041:50:498:275:46
8:27
#18974
25K
15.53 mi13:02:222:12:078:3021:18
8:47
#18920
30K
18.64 mi13:30:422:40:278:3628:20
9:07
#18803
20M
20.00 mi13:43:182:53:038:3912:36
9:16
#18730
21M
21.00 mi13:52:583:02:438:429:40
9:40
#18620
35K
21.75 mi14:00:133:09:588:447:15
9:41
#18734
23M
23.00 mi14:11:363:21:218:4511:23
9:05
#18607
24M
24.00 mi14:20:183:30:038:458:42
8:42
#18476
40K
24.85 mi14:27:413:37:268:457:23
8:38
#18305
25.2M
25.20 mi14:31:033:40:488:463:22
9:46
#18268
Finish
26.22 mi14:38:593:48:448:447:56
7:47
#18024
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi180356368636819522(Top 69%)7188(Top 59%)7188(Top 131%)
10K6.21 mi3.10 mi18524-4896633-2656633-26519083(Top 67%)6934(Top 57%)6934(Top 127%)
15K9.32 mi3.11 mi18850-3266826-1936826-19319522(Top 69%)7188(Top 59%)7188(Top 131%)
20K12.43 mi3.11 mi18967-1176885-596885-5919413(Top 68%)7149(Top 58%)7149(Top 131%)
Half13.11 mi0.68 mi18974-76894-96894-918825(Top 66%)6819(Top 56%)6819(Top 125%)
25K15.53 mi2.42 mi18920+546871+236871+2318829(Top 66%)6892(Top 56%)6892(Top 126%)
30K18.64 mi3.11 mi18803+1176829+426829+4218257(Top 64%)6723(Top 55%)6723(Top 123%)
20M20.00 mi1.36 mi18730+736821+86821+818128(Top 64%)6797(Top 56%)6797(Top 124%)
21M21.00 mi1.00 mi18620+1106786+356786+3516832(Top 59%)6179(Top 51%)6179(Top 113%)
35K21.75 mi0.75 mi18734-1146870-846870-8420945(Top 74%)8485(Top 69%)8485(Top 155%)
23M23.00 mi1.25 mi18607+1276825+456825+4516740(Top 59%)6307(Top 52%)6307(Top 115%)
24M24.00 mi1.00 mi18476+1316779+466779+4615702(Top 55%)5766(Top 47%)5766(Top 105%)
40K24.85 mi0.85 mi18305+1716714+656714+6514218(Top 50%)5098(Top 42%)5098(Top 93%)
25.2M25.20 mi0.35 mi18268+376706+86706+815813(Top 56%)6021(Top 49%)6021(Top 110%)
Finish26.22 mi1.02 mi18024+2446584+1226584+12211274(Top 40%)3610(Top 30%)3610(Top 66%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21story building
+97ft-345ft

Overall

19522

Females

7188

F18-39

7188

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

19083

Females

6934

F18-39

6934

10K→15K

6.2 - 9.3 mi

Top 69%
×3story building
+67ft-78ft

Overall

19522

Females

7188

F18-39

7188

15K→20K

9.3 - 12.4 mi

Top 68%
×5story building
+106ft-86ft

Overall

19413

Females

7149

F18-39

7149

20K→Half

12.4 - 13.1 mi

Top 66%
×2story building
+19ft-37ft

Overall

18825

Females

6819

F18-39

6819

Half→25K

13.1 - 15.5 mi

Top 66%
×4story building
+66ft-88ft

Overall

18829

Females

6892

F18-39

6892

25K→30K

15.5 - 18.6 mi

Top 64%
×9story building
+181ft-148ft

Overall

18257

Females

6723

F18-39

6723

30K→20M

18.6 - 20.0 mi

Top 64%
×5story building
+64ft-50ft

Overall

18128

Females

6797

F18-39

6797

20M→21M

20.0 - 21.0 mi

Top 59%
×8story building
+106ft-24ft

Overall

16832

Females

6179

F18-39

6179

21M→35K

21.0 - 21.8 mi

Top 74%
×7story building
+17ft-86ft

Overall

20945

Females

8485

F18-39

8485

35K→23M

21.8 - 23.0 mi

Top 59%
×5story building
+23ft-63ft

Overall

16740

Females

6307

F18-39

6307

23M→24M

23.0 - 24.0 mi

Top 55%
×6story building
+12ft-82ft

Overall

15702

Females

5766

F18-39

5766

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

14218

Females

5098

F18-39

5098

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1story
+13ft-16ft

Overall

15813

Females

6021

F18-39

6021

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2story building
+22ft-21ft

Overall

11274

Females

3610

F18-39

3610

Passing Analysis

Category:
Athletes Passed
2009
Passed By
1998
Net Change
+11
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18035
5K → 10K119608-489#18035#18524
10K → 15K94420-326#18524#18850
15K → 20K170287-117#18850#18967
20K → Half2431-7#18967#18974
Half → 25K189135+54#18974#18920
25K → 30K294177+117#18920#18803
30K → 20M13259+73#18803#18730
20M → 21M16555+110#18730#18620
21M → 35K29143-114#18620#18734
35K → 23M16740+127#18734#18607
23M → 24M15019+131#18607#18476
24M → 40K18110+171#18476#18305
40K → 25.2M5013+37#18305#18268
25.2M → Finish2451+244#18268#18024
TOTALS20091998+11
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing