Boston Marathon logo
BOSTON MARATHON 2025

Samantha Sullivan

Bib: 31730•F

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:24
Rank: #21622
Start → 5K
8:49/mi
27:24 split
10K· 6.21 mi
54:53
Rank: #21625 (-3)
5K → 10K
8:51/mi
27:29 split
15K· 9.32 mi
1:22:44
Rank: #21693 (-68)
10K → 15K
8:58/mi
27:51 split
20K· 12.43 mi
1:51:32
Rank: #21819 (-126)
15K → 20K
9:16/mi
28:48 split
Half· 13.11 mi
1:57:54
Rank: #21890 (-71)
20K → Half
9:20/mi
6:22 split
25K· 15.53 mi
2:21:08
Rank: #21956 (-66)
Half → 25K
9:35/mi
23:14 split
30K· 18.64 mi
2:52:20
Rank: #21955 (+1)
25K → 30K
10:03/mi
31:12 split
20M
3:06:21
Rank: #21948 (+7)
30K → 20M
10:19/mi
14:01 split
21M
3:16:53
Rank: #21828 (+120)
20M → 21M
10:32/mi
10:32 split
35K· 21.75 mi
3:24:00
Rank: #21772 (+56)
21M → 35K
9:31/mi
7:07 split
23M
3:36:16
Rank: #21628 (+144)
35K → 23M
9:48/mi
12:16 split
24M
3:46:57
Rank: #21719 (-91)
23M → 24M
10:41/mi
10:41 split
40K· 24.85 mi
3:55:16
Rank: #21618 (+101)
24M → 40K
9:44/mi
8:19 split
25.2M
3:58:51
Rank: #21573 (+45)
40K → 25.2M
10:23/mi
3:35 split
Finish· 26.22 mi
4:08:20
Rank: #21516 (+57)
25.2M → Finish
9:18/mi
9:29 split

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
Time1:57:54
Pace9:00 /mi
2nd Half
Distance13.11 mi
Time2:10:26
Pace9:57 /mi
📊Positive Split: 10.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:1827:248:4927:24
8:49
-
10K
6.21 mi12:15:4754:538:5027:29
8:51
+0:02
15K
9.32 mi12:43:381:22:448:5327:51
8:58
+0:07
20K
12.43 mi13:12:261:51:328:5828:48
9:16
+0:18
Half
13.11 mi13:18:481:57:549:006:22
9:20
+0:04
25K
15.53 mi13:42:022:21:089:0523:14
9:35
+0:15
30K
18.64 mi14:13:142:52:209:1531:12
10:03
+0:28
20M
20.00 mi14:27:153:06:219:1914:01
10:19
+0:16
21M
21.00 mi14:37:473:16:539:2310:32
10:32
+0:13
35K
21.75 mi14:44:543:24:009:237:07
9:31
-1:01
23M
23.00 mi14:57:103:36:169:2412:16
9:48
+0:17
24M
24.00 mi15:07:513:46:579:2710:41
10:41
+0:53
40K
24.85 mi15:16:103:55:169:288:19
9:44
-0:57
25.2M
25.20 mi15:19:453:58:519:293:35
10:23
+0:39
Finish
26.22 mi15:29:144:08:209:299:29
9:18
-1:05

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

9:29 /mi

Slowest Pace

10:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:51:32

45% of race

Time at Steady Pace

1:06:47

27% of race

Time at Slower Pace

1:10:01

28% of race

Average Pace: 9:28 /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 mi11:48:1827:248:4927:24
8:49
#21622
10K
6.21 mi12:15:4754:538:5027:29
8:51
#21625
15K
9.32 mi12:43:381:22:448:5327:51
8:58
#21693
20K
12.43 mi13:12:261:51:328:5828:48
9:16
#21819
Half
13.11 mi13:18:481:57:549:006:22
9:20
#21890
25K
15.53 mi13:42:022:21:089:0523:14
9:35
#21956
30K
18.64 mi14:13:142:52:209:1531:12
10:03
#21955
20M
20.00 mi14:27:153:06:219:1914:01
10:19
#21948
21M
21.00 mi14:37:473:16:539:2310:32
10:32
#21828
35K
21.75 mi14:44:543:24:009:237:07
9:31
#21772
23M
23.00 mi14:57:103:36:169:2412:16
9:48
#21628
24M
24.00 mi15:07:513:46:579:2710:41
10:41
#21719
40K
24.85 mi15:16:103:55:169:288:19
9:44
#21618
25.2M
25.20 mi15:19:453:58:519:293:35
10:23
#21573
Finish
26.22 mi15:29:144:08:209:299:29
9:18
#21516
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi216228418841821875(Top 77%)8475(Top 69%)8475(Top 650%)
10K6.21 mi3.10 mi21625-38403+158403+1521634(Top 76%)8388(Top 69%)8388(Top 644%)
15K9.32 mi3.11 mi21693-688427-248427-2421875(Top 77%)8475(Top 69%)8475(Top 650%)
20K12.43 mi3.11 mi21819-1268505-788505-7822186(Top 78%)8691(Top 71%)8691(Top 667%)
Half13.11 mi0.68 mi21890-718544-398544-3923071(Top 81%)9184(Top 75%)9184(Top 705%)
25K15.53 mi2.42 mi21956-668578-348578-3422130(Top 78%)8722(Top 71%)8722(Top 669%)
30K18.64 mi3.11 mi21955+18598-208598-2021719(Top 76%)8624(Top 71%)8624(Top 662%)
20M20.00 mi1.36 mi21948+78604-68604-621914(Top 77%)8840(Top 72%)8840(Top 678%)
21M21.00 mi1.00 mi21828+1208569+358569+3520137(Top 71%)7992(Top 65%)7992(Top 613%)
35K21.75 mi0.75 mi21772+568557+128557+1220397(Top 72%)8188(Top 67%)8188(Top 628%)
23M23.00 mi1.25 mi21628+1448507+508507+5019797(Top 70%)7943(Top 65%)7943(Top 610%)
24M24.00 mi1.00 mi21719-918580-738580-7323286(Top 82%)9775(Top 80%)9775(Top 750%)
40K24.85 mi0.85 mi21618+1018545+358545+3519596(Top 69%)7942(Top 65%)7942(Top 610%)
25.2M25.20 mi0.35 mi21573+458526+198526+1918673(Top 66%)7484(Top 61%)7484(Top 574%)
Finish26.22 mi1.02 mi21516+578506+208506+2020424(Top 72%)8356(Top 68%)8356(Top 641%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21story building
+97ft-345ft

Overall

21875

Females

8475

F50-54

8475

5K→10K

3.1 - 6.2 mi

Top 76%
×5story building
+79ft-138ft

Overall

21634

Females

8388

F50-54

8388

10K→15K

6.2 - 9.3 mi

Top 77%
×3story building
+67ft-78ft

Overall

21875

Females

8475

F50-54

8475

15K→20K

9.3 - 12.4 mi

Top 78%
×5story building
+106ft-86ft

Overall

22186

Females

8691

F50-54

8691

20K→Half

12.4 - 13.1 mi

Top 81%
×2story building
+19ft-37ft

Overall

23071

Females

9184

F50-54

9184

Half→25K

13.1 - 15.5 mi

Top 78%
×4story building
+66ft-88ft

Overall

22130

Females

8722

F50-54

8722

25K→30K

15.5 - 18.6 mi

Top 76%
×9story building
+181ft-148ft

Overall

21719

Females

8624

F50-54

8624

30K→20M

18.6 - 20.0 mi

Top 77%
×5story building
+64ft-50ft

Overall

21914

Females

8840

F50-54

8840

20M→21M

20.0 - 21.0 mi

Top 71%
×8story building
+106ft-24ft

Overall

20137

Females

7992

F50-54

7992

21M→35K

21.0 - 21.8 mi

Top 72%
×7story building
+17ft-86ft

Overall

20397

Females

8188

F50-54

8188

35K→23M

21.8 - 23.0 mi

Top 70%
×5story building
+23ft-63ft

Overall

19797

Females

7943

F50-54

7943

23M→24M

23.0 - 24.0 mi

Top 82%
×6story building
+12ft-82ft

Overall

23286

Females

9775

F50-54

9775

24M→40K

24.0 - 24.9 mi

Top 69%
×1story
+6ft-20ft

Overall

19596

Females

7942

F50-54

7942

40K→25.2M

24.9 - 25.2 mi

Top 66%
×1story
+13ft-16ft

Overall

18673

Females

7484

F50-54

7484

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2story building
+22ft-21ft

Overall

20424

Females

8356

F50-54

8356

Passing Analysis

Category:
Athletes Passed
1680
Passed By
1574
Net Change
+106
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21622
5K → 10K269272-3#21622#21625
10K → 15K184252-68#21625#21693
15K → 20K151277-126#21693#21819
20K → Half1485-71#21819#21890
Half → 25K130196-66#21890#21956
25K → 30K194193+1#21956#21955
30K → 20M9184+7#21955#21948
20M → 21M14626+120#21948#21828
21M → 35K7519+56#21828#21772
35K → 23M15612+144#21772#21628
23M → 24M26117-91#21628#21719
24M → 40K11615+101#21719#21618
40K → 25.2M494+45#21618#21573
25.2M → Finish7922+57#21573#21516
TOTALS16801574+106
📊

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