Boston Marathon logo
BOSTON MARATHON 2025

Rosalie Shyu

Bib: 15131•F

IL

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
9:33/mi
29:41
↑ 97↓ 3451.5%
10K· 6.21 mi
9:03/mi
57:47
↑ 79↓ 1380.4%
15K· 9.32 mi
8:59/mi
1:25:41
↑ 67↓ 78
20K· 12.43 mi
8:59/mi
1:53:37
↑ 106↓ 860.1%
Half· 13.11 mi
8:49/mi
1:59:38
↑ 19↓ 370.5%
25K· 15.53 mi
9:23/mi
2:22:23
↑ 66↓ 880.2%
30K· 18.64 mi
10:05/mi
2:53:42
↑ 181↓ 1480.2%
20M
10:26/mi
3:07:53
↑ 64↓ 500.2%
21M
11:50/mi
3:19:43
↑ 106↓ 241.6%
35K· 21.75 mi
9:59/mi
3:27:11
↑ 17↓ 861.7%
23M
10:52/mi
3:40:47
↑ 23↓ 630.6%
24M
10:45/mi
3:51:32
↓ 821.3%
40K· 24.85 mi
11:05/mi
4:01:01
↓ 200.3%
25.2M
12:51/mi
4:05:27
↑ 13↓ 160.2%
Finish· 26.22 mi
10:13/mi
4:15:52
↑ 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
Time1:59:38
Pace9:08 /mi
2nd Half
Distance13.11 mi
Time2:16:14
Pace10:24 /mi
📊Positive Split: 13.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:1029:419:3329:41
9:33
-
10K
6.21 mi12:14:1657:479:1828:06
9:03
-0:30
15K
9.32 mi12:42:101:25:419:1227:54
8:59
-0:04
20K
12.43 mi13:10:061:53:379:0927:56
8:59
0:00
Half
13.11 mi13:16:071:59:389:086:01
8:49
-0:10
25K
15.53 mi13:38:522:22:239:1022:45
9:23
+0:34
30K
18.64 mi14:10:112:53:429:1931:19
10:05
+0:42
20M
20.00 mi14:24:223:07:539:2414:11
10:26
+0:21
21M
21.00 mi14:36:123:19:439:3111:50
11:50
+1:24
35K
21.75 mi14:43:403:27:119:327:28
9:59
-1:51
23M
23.00 mi14:57:163:40:479:3613:36
10:52
+0:53
24M
24.00 mi15:08:013:51:329:3910:45
10:45
-0:07
40K
24.85 mi15:17:304:01:019:429:29
11:05
+0:20
25.2M
25.20 mi15:21:564:05:279:444:26
12:51
+1:46
Finish
26.22 mi15:32:214:15:529:4610:25
10:13
-2:38

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

8:49 /mi

Average Pace

9:46 /mi

Slowest Pace

12:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:52:42

44% of race

Time at Steady Pace

1:33:04

36% of race

Time at Slower Pace

50:06

20% of race

Average Pace: 9:46 /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 mi11:46:1029:419:3329:41
9:33
#24429
10K
6.21 mi12:14:1657:479:1828:06
9:03
#23567
15K
9.32 mi12:42:101:25:419:1227:54
8:59
#23075
20K
12.43 mi13:10:061:53:379:0927:56
8:59
#22543
Half
13.11 mi13:16:071:59:389:086:01
8:49
#22457
25K
15.53 mi13:38:522:22:239:1022:45
9:23
#22313
30K
18.64 mi14:10:112:53:429:1931:19
10:05
#22228
20M
20.00 mi14:24:223:07:539:2414:11
10:26
#22233
21M
21.00 mi14:36:123:19:439:3111:50
11:50
#22289
35K
21.75 mi14:43:403:27:119:327:28
9:59
#22268
23M
23.00 mi14:57:163:40:479:3613:36
10:52
#22292
24M
24.00 mi15:08:013:51:329:3910:45
10:45
#22338
40K
24.85 mi15:17:304:01:019:429:29
11:05
#22365
25.2M
25.20 mi15:21:564:05:279:444:26
12:51
#22415
Finish
26.22 mi15:32:214:15:529:4610:25
10:13
#22462
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi244299922992221962(Top 77%)8529(Top 70%)8529(Top 156%)
10K6.21 mi3.10 mi23567+8629463+4599463+45922588(Top 80%)8916(Top 73%)8916(Top 163%)
15K9.32 mi3.11 mi23075+4929170+2939170+29321962(Top 77%)8529(Top 70%)8529(Top 156%)
20K12.43 mi3.11 mi22543+5328882+2888882+28820933(Top 74%)8018(Top 66%)8018(Top 147%)
Half13.11 mi0.68 mi22457+868847+358847+3521053(Top 74%)8086(Top 66%)8086(Top 148%)
25K15.53 mi2.42 mi22313+1448767+808767+8021499(Top 76%)8362(Top 68%)8362(Top 153%)
30K18.64 mi3.11 mi22228+858752+158752+1521833(Top 77%)8691(Top 71%)8691(Top 159%)
20M20.00 mi1.36 mi22233-58774-228774-2222260(Top 78%)9039(Top 74%)9039(Top 165%)
21M21.00 mi1.00 mi22289-568826-528826-5223285(Top 82%)9647(Top 79%)9647(Top 176%)
35K21.75 mi0.75 mi22268+218829-38829-321865(Top 77%)8973(Top 73%)8973(Top 164%)
23M23.00 mi1.25 mi22292-248879-508879-5022917(Top 81%)9556(Top 78%)9556(Top 175%)
24M24.00 mi1.00 mi22338-468927-488927-4823455(Top 83%)9859(Top 81%)9859(Top 180%)
40K24.85 mi0.85 mi22365-278963-368963-3623353(Top 82%)9875(Top 81%)9875(Top 181%)
25.2M25.20 mi0.35 mi22415-508999-368999-3624847(Top 87%)10596(Top 87%)10596(Top 194%)
Finish26.22 mi1.02 mi22462-479038-399038-3923596(Top 83%)9970(Top 82%)9970(Top 182%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21story building
+97ft-345ft

Overall

21962

Females

8529

F18-39

8529

5K→10K

3.1 - 6.2 mi

Top 80%
×5story building
+79ft-138ft

Overall

22588

Females

8916

F18-39

8916

10K→15K

6.2 - 9.3 mi

Top 77%
×3story building
+67ft-78ft

Overall

21962

Females

8529

F18-39

8529

15K→20K

9.3 - 12.4 mi

Top 74%
×5story building
+106ft-86ft

Overall

20933

Females

8018

F18-39

8018

20K→Half

12.4 - 13.1 mi

Top 74%
×2story building
+19ft-37ft

Overall

21053

Females

8086

F18-39

8086

Half→25K

13.1 - 15.5 mi

Top 76%
×4story building
+66ft-88ft

Overall

21499

Females

8362

F18-39

8362

25K→30K

15.5 - 18.6 mi

Top 77%
×9story building
+181ft-148ft

Overall

21833

Females

8691

F18-39

8691

30K→20M

18.6 - 20.0 mi

Top 78%
×5story building
+64ft-50ft

Overall

22260

Females

9039

F18-39

9039

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

23285

Females

9647

F18-39

9647

21M→35K

21.0 - 21.8 mi

Top 77%
×7story building
+17ft-86ft

Overall

21865

Females

8973

F18-39

8973

35K→23M

21.8 - 23.0 mi

Top 81%
×5story building
+23ft-63ft

Overall

22917

Females

9556

F18-39

9556

23M→24M

23.0 - 24.0 mi

Top 83%
×6story building
+12ft-82ft

Overall

23455

Females

9859

F18-39

9859

24M→40K

24.0 - 24.9 mi

Top 82%
×1story
+6ft-20ft

Overall

23353

Females

9875

F18-39

9875

40K→25.2M

24.9 - 25.2 mi

Top 87%
×1story
+13ft-16ft

Overall

24847

Females

10596

F18-39

10596

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2story building
+22ft-21ft

Overall

23596

Females

9970

F18-39

9970

Passing Analysis

Category:
Athletes Passed
2844
Passed By
877
Net Change
+1967
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24429
5K → 10K88725+862#24429#23567
10K → 15K51624+492#23567#23075
15K → 20K54210+532#23075#22543
20K → Half915+86#22543#22457
Half → 25K21470+144#22457#22313
25K → 30K229144+85#22313#22228
30K → 20M7580-5#22228#22233
20M → 21M62118-56#22233#22289
21M → 35K4726+21#22289#22268
35K → 23M7397-24#22268#22292
23M → 24M4086-46#22292#22338
24M → 40K3663-27#22338#22365
40K → 25.2M555-50#22365#22415
25.2M → Finish2774-47#22415#22462
TOTALS2844877+1967
📊

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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing