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BOSTON MARATHON 2025

Luisella Merlo

Bib: 20198•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 49%
Masters (Masters Women)
#0 / 6759
Top 38%
Division (F55-59)
#0 / 994
Top 18%
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
7:50/mi
24:19
↑ 97↓ 3451.5%
10K· 6.21 mi
8:00/mi
49:09
↑ 79↓ 1380.4%
15K· 9.32 mi
8:10/mi
1:14:32
↑ 67↓ 78
20K· 12.43 mi
8:28/mi
1:40:50
↑ 106↓ 860.1%
Half· 13.11 mi
8:20/mi
1:46:31
↑ 19↓ 370.5%
25K· 15.53 mi
8:36/mi
2:07:22
↑ 66↓ 880.2%
30K· 18.64 mi
9:00/mi
2:35:21
↑ 181↓ 1480.2%
20M
9:05/mi
2:47:41
↑ 64↓ 500.2%
21M
9:51/mi
2:57:32
↑ 106↓ 241.6%
35K· 21.75 mi
8:45/mi
3:04:05
↑ 17↓ 861.7%
23M
8:59/mi
3:15:20
↑ 23↓ 630.6%
24M
8:53/mi
3:24:13
↓ 821.3%
40K· 24.85 mi
9:05/mi
3:31:59
↓ 200.3%
25.2M
10:00/mi
3:35:26
↑ 13↓ 160.2%
Finish· 26.22 mi
9:01/mi
3:44:37
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:31
Pace8:08 /mi
2nd Half
Distance13.11 mi
Time1:58:06
Pace9:01 /mi
📊Positive Split: 10.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:5724:197:5024:19
7:50
-
10K
6.21 mi11:40:4749:097:5524:50
8:00
+0:10
15K
9.32 mi12:06:101:14:328:0025:23
8:10
+0:10
20K
12.43 mi12:32:281:40:508:0726:18
8:28
+0:18
Half
13.11 mi12:38:091:46:318:085:41
8:20
-0:08
25K
15.53 mi12:59:002:07:228:1220:51
8:36
+0:16
30K
18.64 mi13:26:592:35:218:2027:59
9:00
+0:24
20M
20.00 mi13:39:192:47:418:2312:20
9:05
+0:05
21M
21.00 mi13:49:102:57:328:279:51
9:51
+0:46
35K
21.75 mi13:55:433:04:058:286:33
8:45
-1:06
23M
23.00 mi14:06:583:15:208:3011:15
8:59
+0:14
24M
24.00 mi14:15:513:24:138:318:53
8:53
-0:06
40K
24.85 mi14:23:373:31:598:327:46
9:05
+0:12
25.2M
25.20 mi14:27:043:35:268:333:27
10:00
+0:55
Finish
26.22 mi14:36:153:44:378:349:11
9:01
-0:59

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

7:50 /mi

Average Pace

8:34 /mi

Slowest Pace

10:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:31

47% of race

Time at Steady Pace

1:44:48

47% of race

Time at Slower Pace

13:18

6% of race

Average Pace: 8:34 /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 mi11:15:5724:197:5024:19
7:50
#15079
10K
6.21 mi11:40:4749:097:5524:50
8:00
#15793
15K
9.32 mi12:06:101:14:328:0025:23
8:10
#16305
20K
12.43 mi12:32:281:40:508:0726:18
8:28
#16787
Half
13.11 mi12:38:091:46:318:085:41
8:20
#16865
25K
15.53 mi12:59:002:07:228:1220:51
8:36
#16955
30K
18.64 mi13:26:592:35:218:2027:59
9:00
#17048
20M
20.00 mi13:39:192:47:418:2312:20
9:05
#17038
21M
21.00 mi13:49:102:57:328:279:51
9:51
#17055
35K
21.75 mi13:55:433:04:058:286:33
8:45
#17035
23M
23.00 mi14:06:583:15:208:3011:15
8:59
#16968
24M
24.00 mi14:15:513:24:138:318:53
8:53
#16946
40K
24.85 mi14:23:373:31:598:327:46
9:05
#16945
25.2M
25.20 mi14:27:043:35:268:333:27
10:00
#16950
Finish
26.22 mi14:36:153:44:378:349:11
9:01
#17035
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi150794581458117212(Top 61%)5856(Top 48%)5856(Top 589%)
10K6.21 mi3.10 mi15793-7145019-4385019-43816443(Top 58%)5393(Top 44%)5393(Top 543%)
15K9.32 mi3.11 mi16305-5125317-2985317-29817212(Top 61%)5856(Top 48%)5856(Top 589%)
20K12.43 mi3.11 mi16787-4825612-2955612-29517994(Top 63%)6334(Top 52%)6334(Top 637%)
Half13.11 mi0.68 mi16865-785655-435655-4318147(Top 64%)6397(Top 52%)6397(Top 644%)
25K15.53 mi2.42 mi16955-905736-815736-8117810(Top 63%)6316(Top 52%)6316(Top 635%)
30K18.64 mi3.11 mi17048-935850-1145850-11417732(Top 62%)6430(Top 53%)6430(Top 647%)
20M20.00 mi1.36 mi17038+105867-175867-1717211(Top 61%)6259(Top 51%)6259(Top 630%)
21M21.00 mi1.00 mi17055-175909-425909-4217709(Top 62%)6642(Top 54%)6642(Top 668%)
35K21.75 mi0.75 mi17035+205920-115920-1117048(Top 60%)6369(Top 52%)6369(Top 641%)
23M23.00 mi1.25 mi16968+675912+85912+816183(Top 57%)5985(Top 49%)5985(Top 602%)
24M24.00 mi1.00 mi16946+225922-105922-1016776(Top 59%)6366(Top 52%)6366(Top 640%)
40K24.85 mi0.85 mi16945+15957-355957-3516792(Top 59%)6472(Top 53%)6472(Top 651%)
25.2M25.20 mi0.35 mi16950-55975-185975-1817095(Top 60%)6633(Top 54%)6633(Top 667%)
Finish26.22 mi1.02 mi17035-856043-686043-6819122(Top 67%)7672(Top 63%)7672(Top 772%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21story building
+97ft-345ft

Overall

17212

Females

5856

F55-59

5856

5K→10K

3.1 - 6.2 mi

Top 58%
×5story building
+79ft-138ft

Overall

16443

Females

5393

F55-59

5393

10K→15K

6.2 - 9.3 mi

Top 61%
×3story building
+67ft-78ft

Overall

17212

Females

5856

F55-59

5856

15K→20K

9.3 - 12.4 mi

Top 63%
×5story building
+106ft-86ft

Overall

17994

Females

6334

F55-59

6334

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

18147

Females

6397

F55-59

6397

Half→25K

13.1 - 15.5 mi

Top 63%
×4story building
+66ft-88ft

Overall

17810

Females

6316

F55-59

6316

25K→30K

15.5 - 18.6 mi

Top 62%
×9story building
+181ft-148ft

Overall

17732

Females

6430

F55-59

6430

30K→20M

18.6 - 20.0 mi

Top 61%
×5story building
+64ft-50ft

Overall

17211

Females

6259

F55-59

6259

20M→21M

20.0 - 21.0 mi

Top 62%
×8story building
+106ft-24ft

Overall

17709

Females

6642

F55-59

6642

21M→35K

21.0 - 21.8 mi

Top 60%
×7story building
+17ft-86ft

Overall

17048

Females

6369

F55-59

6369

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

16183

Females

5985

F55-59

5985

23M→24M

23.0 - 24.0 mi

Top 59%
×6story building
+12ft-82ft

Overall

16776

Females

6366

F55-59

6366

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

16792

Females

6472

F55-59

6472

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

17095

Females

6633

F55-59

6633

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2story building
+22ft-21ft

Overall

19122

Females

7672

F55-59

7672

Passing Analysis

Category:
Athletes Passed
1284
Passed By
3240
Net Change
-1956
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15079
5K → 10K104818-714#15079#15793
10K → 15K82594-512#15793#16305
15K → 20K83565-482#16305#16787
20K → Half1694-78#16787#16865
Half → 25K125215-90#16865#16955
25K → 30K194287-93#16955#17048
30K → 20M10191+10#17048#17038
20M → 21M114131-17#17038#17055
21M → 35K7757+20#17055#17035
35K → 23M14780+67#17035#16968
23M → 24M8462+22#16968#16946
24M → 40K7574+1#16946#16945
40K → 25.2M3944-5#16945#16950
25.2M → Finish43128-85#16950#17035
TOTALS12843240-1956
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing