Boston Marathon logo
BOSTON MARATHON 2025

Elizabeth Samuelson

Bib: 23538•F

FL

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 45%
Division (F50-54)
#0 / 1303
Top 41%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:33
Rank: #20173
Start → 5K
26:33 | 8:33/mi
10K· 6.21 mi
53:06
Rank: #20113 (+60)
5K → 10K
26:33 | 8:33/mi
15K· 9.32 mi
1:19:36
Rank: #19920 (+193)
10K → 15K
26:30 | 8:32/mi
20K· 12.43 mi
1:46:24
Rank: #19663 (+257)
15K → 20K
26:48 | 8:38/mi
Half· 13.11 mi
1:52:14
Rank: #19647 (+16)
20K → Half
5:50 | 8:33/mi
25K· 15.53 mi
2:13:01
Rank: #19275 (+372)
Half → 25K
20:47 | 8:34/mi
30K· 18.64 mi
2:40:15
Rank: #18731 (+544)
25K → 30K
27:14 | 8:46/mi
20M
2:52:22
Rank: #18543 (+188)
30K → 20M
12:07 | 8:55/mi
21M
3:01:58
Rank: #18390 (+153)
20M → 21M
9:36 | 9:36/mi
35K· 21.75 mi
3:08:24
Rank: #18305 (+85)
21M → 35K
6:26 | 8:36/mi
23M
3:19:39
Rank: #18173 (+132)
35K → 23M
11:15 | 8:59/mi
24M
3:28:48
Rank: #18155 (+18)
23M → 24M
9:09 | 9:09/mi
40K· 24.85 mi
3:36:32
Rank: #18088 (+67)
24M → 40K
7:44 | 9:03/mi
25.2M
3:40:16
Rank: #18142 (-54)
40K → 25.2M
3:44 | 10:50/mi
Finish· 26.22 mi
3:49:14
Rank: #18140 (+2)
25.2M → Finish
8:58 | 8:48/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
Time1:52:14
Pace8:34 /mi
2nd Half
Distance13.11 mi
Time1:57:00
Pace8:56 /mi
📊Positive Split: 4.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:0726:338:3326:33
8:33
-
10K
6.21 mi11:51:4053:068:3326:33
8:33
0:00
15K
9.32 mi12:18:101:19:368:3226:30
8:32
-0:01
20K
12.43 mi12:44:581:46:248:3426:48
8:38
+0:06
Half
13.11 mi12:50:481:52:148:345:50
8:33
-0:05
25K
15.53 mi13:11:352:13:018:3420:47
8:34
+0:01
30K
18.64 mi13:38:492:40:158:3627:14
8:46
+0:12
20M
20.00 mi13:50:562:52:228:3712:07
8:55
+0:09
21M
21.00 mi14:00:323:01:588:409:36
9:36
+0:41
35K
21.75 mi14:06:583:08:248:406:26
8:36
-1:00
23M
23.00 mi14:18:133:19:398:4111:15
8:59
+0:23
24M
24.00 mi14:27:223:28:488:429:09
9:09
+0:10
40K
24.85 mi14:35:063:36:328:437:44
9:03
-0:06
25.2M
25.20 mi14:38:503:40:168:443:44
10:50
+1:47
Finish
26.22 mi14:47:483:49:148:458:58
8:48
-2:02

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

8:32 /mi

Average Pace

8:45 /mi

Slowest Pace

10:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:26:45

90% of race

Time at Slower Pace

22:29

10% of race

Average Pace: 8:45 /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 mi11:25:0726:338:3326:33
8:33
#20173
10K
6.21 mi11:51:4053:068:3326:33
8:33
#20113
15K
9.32 mi12:18:101:19:368:3226:30
8:32
#19920
20K
12.43 mi12:44:581:46:248:3426:48
8:38
#19663
Half
13.11 mi12:50:481:52:148:345:50
8:33
#19647
25K
15.53 mi13:11:352:13:018:3420:47
8:34
#19275
30K
18.64 mi13:38:492:40:158:3627:14
8:46
#18731
20M
20.00 mi13:50:562:52:228:3712:07
8:55
#18543
21M
21.00 mi14:00:323:01:588:409:36
9:36
#18390
35K
21.75 mi14:06:583:08:248:406:26
8:36
#18305
23M
23.00 mi14:18:133:19:398:4111:15
8:59
#18173
24M
24.00 mi14:27:223:28:488:429:09
9:09
#18155
40K
24.85 mi14:35:063:36:328:437:44
9:03
#18088
25.2M
25.20 mi14:38:503:40:168:443:44
10:50
#18142
Finish
26.22 mi14:47:483:49:148:458:58
8:48
#18140
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi201737598759819514(Top 69%)7180(Top 59%)7180(Top 551%)
10K6.21 mi3.10 mi20113+607538+607538+6020076(Top 71%)7508(Top 61%)7508(Top 576%)
15K9.32 mi3.11 mi19920+1937421+1177421+11719514(Top 69%)7180(Top 59%)7180(Top 551%)
20K12.43 mi3.11 mi19663+2577280+1417280+14118993(Top 67%)6913(Top 57%)6913(Top 531%)
Half13.11 mi0.68 mi19647+167274+67274+619542(Top 69%)7198(Top 59%)7198(Top 552%)
25K15.53 mi2.42 mi19275+3727073+2017073+20117648(Top 62%)6223(Top 51%)6223(Top 478%)
30K18.64 mi3.11 mi18731+5446790+2836790+28316412(Top 58%)5699(Top 47%)5699(Top 437%)
20M20.00 mi1.36 mi18543+1886711+796711+7916366(Top 58%)5814(Top 48%)5814(Top 446%)
21M21.00 mi1.00 mi18390+1536663+486663+4816579(Top 58%)6025(Top 49%)6025(Top 462%)
35K21.75 mi0.75 mi18305+856628+356628+3516114(Top 57%)5857(Top 48%)5857(Top 450%)
23M23.00 mi1.25 mi18173+1326586+426586+4216195(Top 57%)5997(Top 49%)5997(Top 460%)
24M24.00 mi1.00 mi18155+186601-156601-1518130(Top 64%)7104(Top 58%)7104(Top 545%)
40K24.85 mi0.85 mi18088+676593+86593+816606(Top 58%)6376(Top 52%)6376(Top 489%)
25.2M25.20 mi0.35 mi18142-546635-426635-4220127(Top 71%)8217(Top 67%)8217(Top 631%)
Finish26.22 mi1.02 mi18140+26647-126647-1218054(Top 64%)7111(Top 58%)7111(Top 546%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21stories
+97ft-345ft

Overall

19514

Females

7180

F50-54

7180

5K→10K

3.1 - 6.2 mi

Top 71%
×5stories
+79ft-138ft

Overall

20076

Females

7508

F50-54

7508

10K→15K

6.2 - 9.3 mi

Top 69%
×3stories
+67ft-78ft

Overall

19514

Females

7180

F50-54

7180

15K→20K

9.3 - 12.4 mi

Top 67%
×5stories
+106ft-86ft

Overall

18993

Females

6913

F50-54

6913

20K→Half

12.4 - 13.1 mi

Top 69%
×2stories
+19ft-37ft

Overall

19542

Females

7198

F50-54

7198

Half→25K

13.1 - 15.5 mi

Top 62%
×4stories
+66ft-88ft

Overall

17648

Females

6223

F50-54

6223

25K→30K

15.5 - 18.6 mi

Top 58%
×9stories
+181ft-148ft

Overall

16412

Females

5699

F50-54

5699

30K→20M

18.6 - 20.0 mi

Top 58%
×5stories
+64ft-50ft

Overall

16366

Females

5814

F50-54

5814

20M→21M

20.0 - 21.0 mi

Top 58%
×8stories
+106ft-24ft

Overall

16579

Females

6025

F50-54

6025

21M→35K

21.0 - 21.8 mi

Top 57%
×7stories
+17ft-86ft

Overall

16114

Females

5857

F50-54

5857

35K→23M

21.8 - 23.0 mi

Top 57%
×5stories
+23ft-63ft

Overall

16195

Females

5997

F50-54

5997

23M→24M

23.0 - 24.0 mi

Top 64%
×6stories
+12ft-82ft

Overall

18130

Females

7104

F50-54

7104

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

16606

Females

6376

F50-54

6376

40K→25.2M

24.9 - 25.2 mi

Top 71%
×1story
+13ft-16ft

Overall

20127

Females

8217

F50-54

8217

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2stories
+22ft-21ft

Overall

18054

Females

7111

F50-54

7111

Passing Analysis

Category:
Athletes Passed
2852
Passed By
819
Net Change
+2033
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20173
5K → 10K306246+60#20173#20113
10K → 15K28996+193#20113#19920
15K → 20K33275+257#19920#19663
20K → Half4428+16#19663#19647
Half → 25K39927+372#19647#19275
25K → 30K56319+544#19275#18731
30K → 20M21123+188#18731#18543
20M → 21M17623+153#18543#18390
21M → 35K10419+85#18390#18305
35K → 23M16836+132#18305#18173
23M → 24M8466+18#18173#18155
24M → 40K9932+67#18155#18088
40K → 25.2M1569-54#18088#18142
25.2M → Finish6260+2#18142#18140
TOTALS2852819+2033
📊

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