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BOSTON MARATHON 2025

Carolina Fiallos

Bib: 18513•F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 49%
Gender (Female)
#0 / 12228
Top 34%
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:59
Rank: #14146
Start → 5K
23:59 | 7:43/mi
10K· 6.21 mi
47:37
Rank: #13624 (+522)
5K → 10K
23:38 | 7:36/mi
15K· 9.32 mi
1:11:40
Rank: #13658 (-34)
10K → 15K
24:03 | 7:44/mi
20K· 12.43 mi
1:35:51
Rank: #13482 (+176)
15K → 20K
24:11 | 7:47/mi
Half· 13.11 mi
1:41:07
Rank: #13489 (-7)
20K → Half
5:16 | 7:43/mi
25K· 15.53 mi
2:00:28
Rank: #13485 (+4)
Half → 25K
19:21 | 7:59/mi
30K· 18.64 mi
2:26:29
Rank: #13552 (-67)
25K → 30K
26:01 | 8:22/mi
20M
2:38:07
Rank: #13570 (-18)
30K → 20M
11:38 | 8:34/mi
21M
2:47:27
Rank: #13646 (-76)
20M → 21M
9:20 | 9:20/mi
35K· 21.75 mi
2:53:34
Rank: #13635 (+11)
21M → 35K
6:07 | 8:11/mi
23M
3:04:22
Rank: #13637 (-2)
35K → 23M
10:48 | 8:38/mi
24M
3:12:54
Rank: #13704 (-67)
23M → 24M
8:32 | 8:32/mi
40K· 24.85 mi
3:20:20
Rank: #13720 (-16)
24M → 40K
7:26 | 8:42/mi
25.2M
3:23:40
Rank: #13754 (-34)
40K → 25.2M
3:20 | 9:40/mi
Finish· 26.22 mi
3:32:13
Rank: #13808 (-54)
25.2M → Finish
8:33 | 8:23/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:07
Pace7:43 /mi
2nd Half
Distance13.11 mi
Time1:51:06
Pace8:29 /mi
📊Positive Split: 9.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:0323:597:4323:59
7:43
-
10K
6.21 mi11:38:4147:377:4023:38
7:36
-0:07
15K
9.32 mi12:02:441:11:407:4124:03
7:44
+0:08
20K
12.43 mi12:26:551:35:517:4324:11
7:47
+0:03
Half
13.11 mi12:32:111:41:077:435:16
7:43
-0:04
25K
15.53 mi12:51:322:00:287:4519:21
7:59
+0:16
30K
18.64 mi13:17:332:26:297:5126:01
8:22
+0:23
20M
20.00 mi13:29:112:38:077:5411:38
8:34
+0:12
21M
21.00 mi13:38:312:47:277:589:20
9:20
+0:46
35K
21.75 mi13:44:382:53:347:596:07
8:11
-1:09
23M
23.00 mi13:55:263:04:228:0110:48
8:38
+0:27
24M
24.00 mi14:03:583:12:548:028:32
8:32
-0:06
40K
24.85 mi14:11:243:20:208:047:26
8:42
+0:10
25.2M
25.20 mi14:14:443:23:408:053:20
9:40
+0:58
Finish
26.22 mi14:23:173:32:138:068:33
8:23
-1:17

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

7:36 /mi

Average Pace

8:06 /mi

Slowest Pace

9:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:00:28

57% of race

Time at Steady Pace

1:11:39

34% of race

Time at Slower Pace

20:06

9% of race

Average Pace: 8:06 /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 mi11:15:0323:597:4323:59
7:43
#14146
10K
6.21 mi11:38:4147:377:4023:38
7:36
#13624
15K
9.32 mi12:02:441:11:407:4124:03
7:44
#13658
20K
12.43 mi12:26:551:35:517:4324:11
7:47
#13482
Half
13.11 mi12:32:111:41:077:435:16
7:43
#13489
25K
15.53 mi12:51:322:00:287:4519:21
7:59
#13485
30K
18.64 mi13:17:332:26:297:5126:01
8:22
#13552
20M
20.00 mi13:29:112:38:077:5411:38
8:34
#13570
21M
21.00 mi13:38:312:47:277:589:20
9:20
#13646
35K
21.75 mi13:44:382:53:347:596:07
8:11
#13635
23M
23.00 mi13:55:263:04:228:0110:48
8:38
#13637
24M
24.00 mi14:03:583:12:548:028:32
8:32
#13704
40K
24.85 mi14:11:243:20:208:047:26
8:42
#13720
25.2M
25.20 mi14:14:443:23:408:053:20
9:40
#13754
Finish
26.22 mi14:23:173:32:138:068:33
8:23
#13808
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi141464002400213880(Top 49%)3943(Top 32%)3943(Top 72%)
10K6.21 mi3.10 mi13624+5223722+2803722+28013112(Top 46%)3442(Top 28%)3442(Top 63%)
15K9.32 mi3.11 mi13658-343774-523774-5213880(Top 49%)3943(Top 32%)3943(Top 72%)
20K12.43 mi3.11 mi13482+1763717+573717+5713163(Top 46%)3638(Top 30%)3638(Top 67%)
Half13.11 mi0.68 mi13489-73722-53722-513643(Top 48%)3865(Top 32%)3865(Top 71%)
25K15.53 mi2.42 mi13485+43766-443766-4413758(Top 48%)4084(Top 33%)4084(Top 75%)
30K18.64 mi3.11 mi13552-673852-863852-8613989(Top 49%)4358(Top 36%)4358(Top 80%)
20M20.00 mi1.36 mi13570-183890-383890-3814180(Top 50%)4602(Top 38%)4602(Top 84%)
21M21.00 mi1.00 mi13646-763976-863976-8615321(Top 54%)5351(Top 44%)5351(Top 98%)
35K21.75 mi0.75 mi13635+113986-103986-1013489(Top 47%)4420(Top 36%)4420(Top 81%)
23M23.00 mi1.25 mi13637-24031-454031-4514102(Top 50%)4846(Top 40%)4846(Top 89%)
24M24.00 mi1.00 mi13704-674093-624093-6214740(Top 52%)5228(Top 43%)5228(Top 96%)
40K24.85 mi0.85 mi13720-164127-344127-3414586(Top 51%)5285(Top 43%)5285(Top 97%)
25.2M25.20 mi0.35 mi13754-344169-424169-4215464(Top 54%)5788(Top 47%)5788(Top 106%)
Finish26.22 mi1.02 mi13808-544217-484217-4815515(Top 55%)5755(Top 47%)5755(Top 105%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 49%
×21stories
+97ft-345ft

Overall

13880

Females

3943

F18-39

3943

5K→10K

3.1 - 6.2 mi

Top 46%
×5stories
+79ft-138ft

Overall

13112

Females

3442

F18-39

3442

10K→15K

6.2 - 9.3 mi

Top 49%
×3stories
+67ft-78ft

Overall

13880

Females

3943

F18-39

3943

15K→20K

9.3 - 12.4 mi

Top 46%
×5stories
+106ft-86ft

Overall

13163

Females

3638

F18-39

3638

20K→Half

12.4 - 13.1 mi

Top 48%
×2stories
+19ft-37ft

Overall

13643

Females

3865

F18-39

3865

Half→25K

13.1 - 15.5 mi

Top 48%
×4stories
+66ft-88ft

Overall

13758

Females

4084

F18-39

4084

25K→30K

15.5 - 18.6 mi

Top 49%
×9stories
+181ft-148ft

Overall

13989

Females

4358

F18-39

4358

30K→20M

18.6 - 20.0 mi

Top 50%
×5stories
+64ft-50ft

Overall

14180

Females

4602

F18-39

4602

20M→21M

20.0 - 21.0 mi

Top 54%
×8stories
+106ft-24ft

Overall

15321

Females

5351

F18-39

5351

21M→35K

21.0 - 21.8 mi

Top 47%
×7stories
+17ft-86ft

Overall

13489

Females

4420

F18-39

4420

35K→23M

21.8 - 23.0 mi

Top 50%
×5stories
+23ft-63ft

Overall

14102

Females

4846

F18-39

4846

23M→24M

23.0 - 24.0 mi

Top 52%
×6stories
+12ft-82ft

Overall

14740

Females

5228

F18-39

5228

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

14586

Females

5285

F18-39

5285

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

15464

Females

5788

F18-39

5788

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2stories
+22ft-21ft

Overall

15515

Females

5755

F18-39

5755

Passing Analysis

Category:
Athletes Passed
2111
Passed By
1773
Net Change
+338
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14146
5K → 10K61997+522#14146#13624
10K → 15K197231-34#13624#13658
15K → 20K279103+176#13658#13482
20K → Half3340-7#13482#13489
Half → 25K170166+4#13489#13485
25K → 30K225292-67#13485#13552
30K → 20M119137-18#13552#13570
20M → 21M81157-76#13570#13646
21M → 35K6049+11#13646#13635
35K → 23M115117-2#13635#13637
23M → 24M62129-67#13637#13704
24M → 40K7995-16#13704#13720
40K → 25.2M2559-34#13720#13754
25.2M → Finish47101-54#13754#13808
TOTALS21111773+338
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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