Boston Marathon logo
BOSTON MARATHON 2025

Yichun Sun

Bib: 16231•F

AB

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 48%
Gender (Female)
#0 / 12228
Top 33%
Masters (Masters Women)
#0 / 6759
Top 19%
Division (F50-54)
#0 / 1303
Top 11%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:12
Rank: #14723
Start → 5K
24:12 | 7:47/mi
10K· 6.21 mi
48:29
Rank: #14815 (-92)
5K → 10K
24:17 | 7:49/mi
15K· 9.32 mi
1:12:43
Rank: #14644 (+171)
10K → 15K
24:14 | 7:48/mi
20K· 12.43 mi
1:37:15
Rank: #14462 (+182)
15K → 20K
24:32 | 7:54/mi
Half· 13.11 mi
1:42:33
Rank: #14419 (+43)
20K → Half
5:18 | 7:46/mi
25K· 15.53 mi
2:01:38
Rank: #14133 (+286)
Half → 25K
19:05 | 7:52/mi
30K· 18.64 mi
2:27:20
Rank: #13915 (+218)
25K → 30K
25:42 | 8:16/mi
20M
2:38:45
Rank: #13807 (+108)
30K → 20M
11:25 | 8:24/mi
21M
2:47:47
Rank: #13787 (+20)
20M → 21M
9:02 | 9:02/mi
35K· 21.75 mi
2:53:48
Rank: #13714 (+73)
21M → 35K
6:01 | 8:03/mi
23M
3:04:19
Rank: #13620 (+94)
35K → 23M
10:31 | 8:24/mi
24M
3:12:33
Rank: #13574 (+46)
23M → 24M
8:14 | 8:14/mi
40K· 24.85 mi
3:19:43
Rank: #13530 (+44)
24M → 40K
7:10 | 8:23/mi
25.2M
3:22:56
Rank: #13517 (+13)
40K → 25.2M
3:13 | 9:20/mi
Finish· 26.22 mi
3:31:19
Rank: #13569 (-52)
25.2M → Finish
8:23 | 8:14/mi

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
Time1:42:33
Pace7:49 /mi
2nd Half
Distance13.11 mi
Time1:48:46
Pace8:18 /mi
📊Positive Split: 6.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:57:0924:127:4724:12
7:47
-
10K
6.21 mi11:21:2648:297:4824:17
7:49
+0:02
15K
9.32 mi11:45:401:12:437:4824:14
7:48
-0:01
20K
12.43 mi12:10:121:37:157:5024:32
7:54
+0:06
Half
13.11 mi12:15:301:42:337:495:18
7:46
-0:08
25K
15.53 mi12:34:352:01:387:5019:05
7:52
+0:06
30K
18.64 mi13:00:172:27:207:5425:42
8:16
+0:24
20M
20.00 mi13:11:422:38:457:5611:25
8:24
+0:08
21M
21.00 mi13:20:442:47:477:599:02
9:02
+0:38
35K
21.75 mi13:26:452:53:487:596:01
8:03
-0:59
23M
23.00 mi13:37:163:04:198:0110:31
8:24
+0:21
24M
24.00 mi13:45:303:12:338:018:14
8:14
-0:10
40K
24.85 mi13:52:403:19:438:027:10
8:23
+0:09
25.2M
25.20 mi13:55:533:22:568:033:13
9:20
+0:57
Finish
26.22 mi14:04:163:31:198:048:23
8:14
-1:06

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

7:46 /mi

Average Pace

8:04 /mi

Slowest Pace

9:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:01:38

58% of race

Time at Steady Pace

1:17:26

37% of race

Time at Slower Pace

12:15

6% of race

Average Pace: 8:04 /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 mi10:57:0924:127:4724:12
7:47
#14723
10K
6.21 mi11:21:2648:297:4824:17
7:49
#14815
15K
9.32 mi11:45:401:12:437:4824:14
7:48
#14644
20K
12.43 mi12:10:121:37:157:5024:32
7:54
#14462
Half
13.11 mi12:15:301:42:337:495:18
7:46
#14419
25K
15.53 mi12:34:352:01:387:5019:05
7:52
#14133
30K
18.64 mi13:00:172:27:207:5425:42
8:16
#13915
20M
20.00 mi13:11:422:38:457:5611:25
8:24
#13807
21M
21.00 mi13:20:442:47:477:599:02
9:02
#13787
35K
21.75 mi13:26:452:53:487:596:01
8:03
#13714
23M
23.00 mi13:37:163:04:198:0110:31
8:24
#13620
24M
24.00 mi13:45:303:12:338:018:14
8:14
#13574
40K
24.85 mi13:52:403:19:438:027:10
8:23
#13530
25.2M
25.20 mi13:55:533:22:568:033:13
9:20
#13517
Finish
26.22 mi14:04:163:31:198:048:23
8:14
#13569
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi147234360436014385(Top 51%)4250(Top 35%)4250(Top 326%)
10K6.21 mi3.10 mi14815-924437-774437-7714976(Top 53%)4521(Top 37%)4521(Top 347%)
15K9.32 mi3.11 mi14644+1714339+984339+9814385(Top 51%)4250(Top 35%)4250(Top 326%)
20K12.43 mi3.11 mi14462+1824267+724267+7214074(Top 50%)4134(Top 34%)4134(Top 317%)
Half13.11 mi0.68 mi14419+434244+234244+2314055(Top 49%)4088(Top 33%)4088(Top 314%)
25K15.53 mi2.42 mi14133+2864118+1264118+12612922(Top 45%)3631(Top 30%)3631(Top 279%)
30K18.64 mi3.11 mi13915+2184056+624056+6213322(Top 47%)4013(Top 33%)4013(Top 308%)
20M20.00 mi1.36 mi13807+1084032+244032+2413178(Top 46%)4070(Top 33%)4070(Top 312%)
21M21.00 mi1.00 mi13787+204052-204052-2013721(Top 48%)4474(Top 37%)4474(Top 343%)
35K21.75 mi0.75 mi13714+734030+224030+2212579(Top 44%)3942(Top 32%)3942(Top 303%)
23M23.00 mi1.25 mi13620+944024+64024+612701(Top 45%)4099(Top 34%)4099(Top 315%)
24M24.00 mi1.00 mi13574+464022+24022+212830(Top 45%)4230(Top 35%)4230(Top 325%)
40K24.85 mi0.85 mi13530+444017+54017+512711(Top 45%)4285(Top 35%)4285(Top 329%)
25.2M25.20 mi0.35 mi13517+134022-54022-513647(Top 48%)4827(Top 39%)4827(Top 370%)
Finish26.22 mi1.02 mi13569-524077-554077-5514456(Top 51%)5179(Top 42%)5179(Top 397%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21stories
+97ft-345ft

Overall

14385

Females

4250

F50-54

4250

5K→10K

3.1 - 6.2 mi

Top 53%
×5stories
+79ft-138ft

Overall

14976

Females

4521

F50-54

4521

10K→15K

6.2 - 9.3 mi

Top 51%
×3stories
+67ft-78ft

Overall

14385

Females

4250

F50-54

4250

15K→20K

9.3 - 12.4 mi

Top 50%
×5stories
+106ft-86ft

Overall

14074

Females

4134

F50-54

4134

20K→Half

12.4 - 13.1 mi

Top 49%
×2stories
+19ft-37ft

Overall

14055

Females

4088

F50-54

4088

Half→25K

13.1 - 15.5 mi

Top 45%
×4stories
+66ft-88ft

Overall

12922

Females

3631

F50-54

3631

25K→30K

15.5 - 18.6 mi

Top 47%
×9stories
+181ft-148ft

Overall

13322

Females

4013

F50-54

4013

30K→20M

18.6 - 20.0 mi

Top 46%
×5stories
+64ft-50ft

Overall

13178

Females

4070

F50-54

4070

20M→21M

20.0 - 21.0 mi

Top 48%
×8stories
+106ft-24ft

Overall

13721

Females

4474

F50-54

4474

21M→35K

21.0 - 21.8 mi

Top 44%
×7stories
+17ft-86ft

Overall

12579

Females

3942

F50-54

3942

35K→23M

21.8 - 23.0 mi

Top 45%
×5stories
+23ft-63ft

Overall

12701

Females

4099

F50-54

4099

23M→24M

23.0 - 24.0 mi

Top 45%
×6stories
+12ft-82ft

Overall

12830

Females

4230

F50-54

4230

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

12711

Females

4285

F50-54

4285

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

13647

Females

4827

F50-54

4827

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2stories
+22ft-21ft

Overall

14456

Females

5179

F50-54

5179

Passing Analysis

Category:
Athletes Passed
2379
Passed By
1225
Net Change
+1154
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14723
5K → 10K243335-92#14723#14815
10K → 15K282111+171#14815#14644
15K → 20K288106+182#14644#14462
20K → Half5815+43#14462#14419
Half → 25K31933+286#14419#14133
25K → 30K365147+218#14133#13915
30K → 20M16759+108#13915#13807
20M → 21M11898+20#13807#13787
21M → 35K8916+73#13787#13714
35K → 23M15662+94#13714#13620
23M → 24M10256+46#13620#13574
24M → 40K9450+44#13574#13530
40K → 25.2M4330+13#13530#13517
25.2M → Finish55107-52#13517#13569
TOTALS23791225+1154
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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