Boston Marathon logo
BOSTON MARATHON 2023

Samantha Gasbarro

Bib: 25389•F

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
30:41
Rank: #23146
Start → 5K
30:41 | 9:53/mi
10K· 6.21 mi
1:02:34
Rank: #23783 (-637)
5K → 10K
31:53 | 10:16/mi
15K· 9.32 mi
1:34:02
Rank: #23787 (-4)
10K → 15K
31:28 | 10:08/mi
20K· 12.43 mi
2:06:10
Rank: #23738 (+49)
15K → 20K
32:08 | 10:21/mi
Half· 13.11 mi
2:13:13
Rank: #23750 (-12)
20K → Half
7:03 | 10:20/mi
25K· 15.53 mi
2:40:06
Rank: #23789 (-39)
Half → 25K
26:53 | 11:05/mi
30K· 18.64 mi
3:15:19
Rank: #23770 (+19)
25K → 30K
35:13 | 11:20/mi
20M
3:31:10
Rank: #23770
30K → 20M
15:51 | 11:40/mi
21M
3:43:01
Rank: #23692 (+78)
20M → 21M
11:51 | 11:51/mi
35K· 21.75 mi
3:51:33
Rank: #23720 (-28)
21M → 35K
8:32 | 11:24/mi
23M
4:05:47
Rank: #23708 (+12)
35K → 23M
14:14 | 11:22/mi
24M
4:17:26
Rank: #23738 (-30)
23M → 24M
11:39 | 11:39/mi
40K· 24.85 mi
4:27:36
Rank: #23742 (-4)
24M → 40K
10:10 | 11:53/mi
25.2M
4:31:37
Rank: #23721 (+21)
40K → 25.2M
4:01 | 11:39/mi
Finish· 26.22 mi
4:42:09
Rank: #23683 (+38)
25.2M → Finish
10:32 | 10:20/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
Time2:13:13
Pace10:10 /mi
2nd Half
Distance13.11 mi
Time2:28:56
Pace11:22 /mi
📊Positive Split: 11.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:46:2630:419:5330:41
9:53
-
10K
6.21 mi12:18:191:02:3410:0431:53
10:16
+0:23
15K
9.32 mi12:49:471:34:0210:0531:28
10:08
-0:08
20K
12.43 mi13:21:552:06:1010:0932:08
10:21
+0:13
Half
13.11 mi13:28:582:13:1310:107:03
10:20
-0:01
25K
15.53 mi13:55:512:40:0610:1826:53
11:05
+0:45
30K
18.64 mi14:31:043:15:1910:2935:13
11:20
+0:15
20M
20.00 mi14:46:553:31:1010:3315:51
11:40
+0:20
21M
21.00 mi14:58:463:43:0110:3711:51
11:51
+0:11
35K
21.75 mi15:07:183:51:3310:398:32
11:24
-0:27
23M
23.00 mi15:21:324:05:4710:4114:14
11:22
-0:02
24M
24.00 mi15:33:114:17:2610:4411:39
11:39
+0:17
40K
24.85 mi15:43:214:27:3610:4610:10
11:53
+0:14
25.2M
25.20 mi15:47:224:31:3710:474:01
11:39
-0:14
Finish
26.22 mi15:57:544:42:0910:4610:32
10:20
-1:19

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

9:53 /mi

Average Pace

10:46 /mi

Slowest Pace

11:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:23:45

51% of race

Time at Steady Pace

1:56:23

41% of race

Time at Slower Pace

22:01

8% of race

Average Pace: 10:46 /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 mi11:46:2630:419:5330:41
9:53
#23146
10K
6.21 mi12:18:191:02:3410:0431:53
10:16
#23783
15K
9.32 mi12:49:471:34:0210:0531:28
10:08
#23787
20K
12.43 mi13:21:552:06:1010:0932:08
10:21
#23738
Half
13.11 mi13:28:582:13:1310:107:03
10:20
#23750
25K
15.53 mi13:55:512:40:0610:1826:53
11:05
#23789
30K
18.64 mi14:31:043:15:1910:2935:13
11:20
#23770
20M
20.00 mi14:46:553:31:1010:3315:51
11:40
#23770
21M
21.00 mi14:58:463:43:0110:3711:51
11:51
#23692
35K
21.75 mi15:07:183:51:3310:398:32
11:24
#23720
23M
23.00 mi15:21:324:05:4710:4114:14
11:22
#23708
24M
24.00 mi15:33:114:17:2610:4411:39
11:39
#23738
40K
24.85 mi15:43:214:27:3610:4610:10
11:53
#23742
25.2M
25.20 mi15:47:224:31:3710:474:01
11:39
#23721
Finish
26.22 mi15:57:544:42:0910:4610:32
10:20
#23683
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi231469470947023756(Top 89%)9753(Top 85%)9753(Top 200%)
10K6.21 mi3.10 mi23783-6379777-3079777-30724238(Top 91%)10020(Top 88%)10020(Top 205%)
15K9.32 mi3.11 mi23787-49773+49773+423756(Top 89%)9753(Top 85%)9753(Top 200%)
20K12.43 mi3.11 mi23738+499738+359738+3523560(Top 88%)9669(Top 85%)9669(Top 198%)
Half13.11 mi0.68 mi23750-129752-149752-1423909(Top 90%)9865(Top 86%)9865(Top 202%)
25K15.53 mi2.42 mi23789-399782-309782-3024108(Top 91%)10012(Top 88%)10012(Top 205%)
30K18.64 mi3.11 mi23770+199791-99791-923628(Top 89%)9794(Top 86%)9794(Top 201%)
20M20.00 mi1.36 mi237709800-99800-923777(Top 89%)9948(Top 87%)9948(Top 204%)
21M21.00 mi1.00 mi23692+789768+329768+3222508(Top 85%)9283(Top 81%)9283(Top 190%)
35K21.75 mi0.75 mi23720-289788-209788-2023984(Top 90%)10122(Top 89%)10122(Top 207%)
23M23.00 mi1.25 mi23708+129789-19789-123019(Top 86%)9598(Top 84%)9598(Top 197%)
24M24.00 mi1.00 mi23738-309820-319820-3124080(Top 90%)10200(Top 89%)10200(Top 209%)
40K24.85 mi0.85 mi23742-49825-59825-523760(Top 89%)10063(Top 88%)10063(Top 206%)
25.2M25.20 mi0.35 mi23721+219818+79818+721900(Top 82%)9084(Top 80%)9084(Top 186%)
Finish26.22 mi1.02 mi23683+389805+139805+1322667(Top 85%)9489(Top 83%)9489(Top 194%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 89%
×21stories
+97ft-345ft

Overall

23756

Females

9753

F18-39

9753

5K→10K

3.1 - 6.2 mi

Top 91%
×5stories
+79ft-138ft

Overall

24238

Females

10020

F18-39

10020

10K→15K

6.2 - 9.3 mi

Top 89%
×3stories
+67ft-78ft

Overall

23756

Females

9753

F18-39

9753

15K→20K

9.3 - 12.4 mi

Top 88%
×5stories
+106ft-86ft

Overall

23560

Females

9669

F18-39

9669

20K→Half

12.4 - 13.1 mi

Top 90%
×2stories
+19ft-37ft

Overall

23909

Females

9865

F18-39

9865

Half→25K

13.1 - 15.5 mi

Top 91%
×4stories
+66ft-88ft

Overall

24108

Females

10012

F18-39

10012

25K→30K

15.5 - 18.6 mi

Top 89%
×9stories
+181ft-148ft

Overall

23628

Females

9794

F18-39

9794

30K→20M

18.6 - 20.0 mi

Top 89%
×5stories
+64ft-50ft

Overall

23777

Females

9948

F18-39

9948

20M→21M

20.0 - 21.0 mi

Top 85%
×8stories
+106ft-24ft

Overall

22508

Females

9283

F18-39

9283

21M→35K

21.0 - 21.8 mi

Top 90%
×7stories
+17ft-86ft

Overall

23984

Females

10122

F18-39

10122

35K→23M

21.8 - 23.0 mi

Top 86%
×5stories
+23ft-63ft

Overall

23019

Females

9598

F18-39

9598

23M→24M

23.0 - 24.0 mi

Top 90%
×6stories
+12ft-82ft

Overall

24080

Females

10200

F18-39

10200

24M→40K

24.0 - 24.9 mi

Top 89%
×1story
+6ft-20ft

Overall

23760

Females

10063

F18-39

10063

40K→25.2M

24.9 - 25.2 mi

Top 82%
×1story
+13ft-16ft

Overall

21900

Females

9084

F18-39

9084

25.2M→Finish

25.2 - 26.2 mi

Top 85%
×2stories
+22ft-21ft

Overall

22667

Females

9489

F18-39

9489

Passing Analysis

Category:
Athletes Passed
826
Passed By
1363
Net Change
-537
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23146
5K → 10K34671-637#23146#23783
10K → 15K118122-4#23783#23787
15K → 20K13586+49#23787#23738
20K → Half1931-12#23738#23750
Half → 25K75114-39#23750#23789
25K → 30K11596+19#23789#23770
30K → 20M57570#23770#23770
20M → 21M8911+78#23770#23692
21M → 35K1240-28#23692#23720
35K → 23M4836+12#23720#23708
23M → 24M2454-30#23708#23738
24M → 40K2630-4#23738#23742
40K → 25.2M287+21#23742#23721
25.2M → Finish468+38#23721#23683
TOTALS8261363-537
📊

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