Boston Marathon logo
BOSTON MARATHON 2025

Susan Merolillo

Bib: 14516•F

FL

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 45%
Masters (Masters Women)
#0 / 6759
Top 33%
Division (F50-54)
#0 / 1303
Top 25%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:52
Rank: #13834
Start → 5K
23:52 | 7:41/mi
10K· 6.21 mi
47:51
Rank: #13921 (-87)
5K → 10K
23:59 | 7:43/mi
15K· 9.32 mi
1:12:11
Rank: #14161 (-240)
10K → 15K
24:20 | 7:50/mi
20K· 12.43 mi
1:38:28
Rank: #15310 (-1149)
15K → 20K
26:17 | 8:28/mi
Half· 13.11 mi
1:43:48
Rank: #15259 (+51)
20K → Half
5:20 | 7:49/mi
25K· 15.53 mi
2:03:48
Rank: #15330 (-71)
Half → 25K
20:00 | 8:15/mi
30K· 18.64 mi
2:31:10
Rank: #15593 (-263)
25K → 30K
27:22 | 8:49/mi
20M
2:43:30
Rank: #15667 (-74)
30K → 20M
12:20 | 9:05/mi
21M
2:53:35
Rank: #15854 (-187)
20M → 21M
10:05 | 10:05/mi
35K· 21.75 mi
3:00:05
Rank: #15836 (+18)
21M → 35K
6:30 | 8:41/mi
23M
3:11:50
Rank: #15959 (-123)
35K → 23M
11:45 | 9:23/mi
24M
3:20:58
Rank: #16056 (-97)
23M → 24M
9:08 | 9:08/mi
40K· 24.85 mi
3:28:57
Rank: #16120 (-64)
24M → 40K
7:59 | 9:20/mi
25.2M
3:32:20
Rank: #16120
40K → 25.2M
3:23 | 9:49/mi
Finish· 26.22 mi
3:41:27
Rank: #16240 (-120)
25.2M → Finish
9:07 | 8:57/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
Time1:43:48
Pace7:55 /mi
2nd Half
Distance13.11 mi
Time1:57:39
Pace8:58 /mi
📊Positive Split: 13.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:5823:527:4123:52
7:41
-
10K
6.21 mi11:17:5747:517:4223:59
7:43
+0:02
15K
9.32 mi11:42:171:12:117:4524:20
7:50
+0:07
20K
12.43 mi12:08:341:38:287:5526:17
8:28
+0:38
Half
13.11 mi12:13:541:43:487:555:20
7:49
-0:39
25K
15.53 mi12:33:542:03:487:5820:00
8:15
+0:26
30K
18.64 mi13:01:162:31:108:0727:22
8:49
+0:34
20M
20.00 mi13:13:362:43:308:1012:20
9:05
+0:16
21M
21.00 mi13:23:412:53:358:1610:05
10:05
+1:00
35K
21.75 mi13:30:113:00:058:176:30
8:41
-1:24
23M
23.00 mi13:41:563:11:508:2011:45
9:23
+0:42
24M
24.00 mi13:51:043:20:588:229:08
9:08
-0:15
40K
24.85 mi13:59:033:28:578:247:59
9:20
+0:12
25.2M
25.20 mi14:02:263:32:208:263:23
9:49
+0:29
Finish
26.22 mi14:11:333:41:278:279:07
8:57
-0:52

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

7:41 /mi

Average Pace

8:27 /mi

Slowest Pace

10:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:37:31

44% of race

Time at Steady Pace

1:30:44

41% of race

Time at Slower Pace

33:12

15% of race

Average Pace: 8:27 /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 mi10:53:5823:527:4123:52
7:41
#13834
10K
6.21 mi11:17:5747:517:4223:59
7:43
#13921
15K
9.32 mi11:42:171:12:117:4524:20
7:50
#14161
20K
12.43 mi12:08:341:38:287:5526:17
8:28
#15310
Half
13.11 mi12:13:541:43:487:555:20
7:49
#15259
25K
15.53 mi12:33:542:03:487:5820:00
8:15
#15330
30K
18.64 mi13:01:162:31:108:0727:22
8:49
#15593
20M
20.00 mi13:13:362:43:308:1012:20
9:05
#15667
21M
21.00 mi13:23:412:53:358:1610:05
10:05
#15854
35K
21.75 mi13:30:113:00:058:176:30
8:41
#15836
23M
23.00 mi13:41:563:11:508:2011:45
9:23
#15959
24M
24.00 mi13:51:043:20:588:229:08
9:08
#16056
40K
24.85 mi13:59:033:28:578:247:59
9:20
#16120
25.2M
25.20 mi14:02:263:32:208:263:23
9:49
#16120
Finish
26.22 mi14:11:333:41:278:279:07
8:57
#16240
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi138343801380114673(Top 52%)4404(Top 36%)4404(Top 338%)
10K6.21 mi3.10 mi13921-873893-923893-9214088(Top 50%)4009(Top 33%)4009(Top 308%)
15K9.32 mi3.11 mi14161-2404066-1734066-17314673(Top 52%)4404(Top 36%)4404(Top 338%)
20K12.43 mi3.11 mi15310-11494757-6914757-69117954(Top 63%)6314(Top 52%)6314(Top 485%)
Half13.11 mi0.68 mi15259+514730+274730+2714498(Top 51%)4363(Top 36%)4363(Top 335%)
25K15.53 mi2.42 mi15330-714791-614791-6115629(Top 55%)5089(Top 42%)5089(Top 391%)
30K18.64 mi3.11 mi15593-2634995-2044995-20416658(Top 59%)5834(Top 48%)5834(Top 448%)
20M20.00 mi1.36 mi15667-745079-845079-8417207(Top 61%)6255(Top 51%)6255(Top 480%)
21M21.00 mi1.00 mi15854-1875221-1425221-14218613(Top 66%)7126(Top 58%)7126(Top 547%)
35K21.75 mi0.75 mi15836+185229-85229-816630(Top 59%)6126(Top 50%)6126(Top 470%)
23M23.00 mi1.25 mi15959-1235349-1205349-12018176(Top 64%)7066(Top 58%)7066(Top 542%)
24M24.00 mi1.00 mi16056-975413-645413-6418041(Top 64%)7051(Top 58%)7051(Top 541%)
40K24.85 mi0.85 mi16120-645470-575470-5718028(Top 63%)7132(Top 58%)7132(Top 547%)
25.2M25.20 mi0.35 mi161205481-115481-1116184(Top 57%)6169(Top 50%)6169(Top 473%)
Finish26.22 mi1.02 mi16240-1205563-825563-8218774(Top 66%)7470(Top 61%)7470(Top 573%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 52%
×21stories
+97ft-345ft

Overall

14673

Females

4404

F50-54

4404

5K→10K

3.1 - 6.2 mi

Top 50%
×5stories
+79ft-138ft

Overall

14088

Females

4009

F50-54

4009

10K→15K

6.2 - 9.3 mi

Top 52%
×3stories
+67ft-78ft

Overall

14673

Females

4404

F50-54

4404

15K→20K

9.3 - 12.4 mi

Top 63%
×5stories
+106ft-86ft

Overall

17954

Females

6314

F50-54

6314

20K→Half

12.4 - 13.1 mi

Top 51%
×2stories
+19ft-37ft

Overall

14498

Females

4363

F50-54

4363

Half→25K

13.1 - 15.5 mi

Top 55%
×4stories
+66ft-88ft

Overall

15629

Females

5089

F50-54

5089

25K→30K

15.5 - 18.6 mi

Top 59%
×9stories
+181ft-148ft

Overall

16658

Females

5834

F50-54

5834

30K→20M

18.6 - 20.0 mi

Top 61%
×5stories
+64ft-50ft

Overall

17207

Females

6255

F50-54

6255

20M→21M

20.0 - 21.0 mi

Top 66%
×8stories
+106ft-24ft

Overall

18613

Females

7126

F50-54

7126

21M→35K

21.0 - 21.8 mi

Top 59%
×7stories
+17ft-86ft

Overall

16630

Females

6126

F50-54

6126

35K→23M

21.8 - 23.0 mi

Top 64%
×5stories
+23ft-63ft

Overall

18176

Females

7066

F50-54

7066

23M→24M

23.0 - 24.0 mi

Top 64%
×6stories
+12ft-82ft

Overall

18041

Females

7051

F50-54

7051

24M→40K

24.0 - 24.9 mi

Top 63%
×1story
+6ft-20ft

Overall

18028

Females

7132

F50-54

7132

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

16184

Females

6169

F50-54

6169

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2stories
+22ft-21ft

Overall

18774

Females

7470

F50-54

7470

Passing Analysis

Category:
Athletes Passed
1262
Passed By
3668
Net Change
-2406
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13834
5K → 10K238325-87#13834#13921
10K → 15K119359-240#13921#14161
15K → 20K491198-1149#14161#15310
20K → Half6615+51#15310#15259
Half → 25K153224-71#15259#15330
25K → 30K166429-263#15330#15593
30K → 20M100174-74#15593#15667
20M → 21M62249-187#15667#15854
21M → 35K7658+18#15854#15836
35K → 23M83206-123#15836#15959
23M → 24M36133-97#15959#16056
24M → 40K47111-64#16056#16120
40K → 25.2M30300#16120#16120
25.2M → Finish37157-120#16120#16240
TOTALS12623668-2406
📊

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