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BOSTON MARATHON 2025

Julia Carlson

Bib: 14759•F

IN

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 36%
Gender (Female)
#0 / 12228
Top 19%
Division (F18-39)
#0 / 5469
Top 33%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:20
Rank: #12357
Start → 5K
23:20 | 7:31/mi
10K· 6.21 mi
46:03
Rank: #11336 (+1021)
5K → 10K
22:43 | 7:19/mi
15K· 9.32 mi
1:09:00
Rank: #11099 (+237)
10K → 15K
22:57 | 7:23/mi
20K· 12.43 mi
1:31:49
Rank: #10651 (+448)
15K → 20K
22:49 | 7:21/mi
Half· 13.11 mi
1:36:43
Rank: #10556 (+95)
20K → Half
4:54 | 7:11/mi
25K· 15.53 mi
1:54:35
Rank: #10246 (+310)
Half → 25K
17:52 | 7:22/mi
30K· 18.64 mi
2:18:21
Rank: #9893 (+353)
25K → 30K
23:46 | 7:39/mi
20M
2:28:53
Rank: #9743 (+150)
30K → 20M
10:32 | 7:45/mi
21M
2:37:11
Rank: #9689 (+54)
20M → 21M
8:18 | 8:18/mi
35K· 21.75 mi
2:42:43
Rank: #9588 (+101)
21M → 35K
5:32 | 7:24/mi
23M
2:52:45
Rank: #9594 (-6)
35K → 23M
10:02 | 8:01/mi
24M
3:00:34
Rank: #9593 (+1)
23M → 24M
7:49 | 7:49/mi
40K· 24.85 mi
3:07:42
Rank: #9679 (-86)
24M → 40K
7:08 | 8:21/mi
25.2M
3:11:09
Rank: #9815 (-136)
40K → 25.2M
3:27 | 10:00/mi
Finish· 26.22 mi
3:20:00
Rank: #10150 (-335)
25.2M → Finish
8:51 | 8:41/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:43
Pace7:23 /mi
2nd Half
Distance13.11 mi
Time1:43:17
Pace7:53 /mi
📊Positive Split: 6.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:1123:207:3123:20
7:31
-
10K
6.21 mi11:36:5446:037:2522:43
7:19
-0:12
15K
9.32 mi11:59:511:09:007:2422:57
7:23
+0:04
20K
12.43 mi12:22:401:31:497:2322:49
7:21
-0:02
Half
13.11 mi12:27:341:36:437:234:54
7:11
-0:10
25K
15.53 mi12:45:261:54:357:2317:52
7:22
+0:11
30K
18.64 mi13:09:122:18:217:2523:46
7:39
+0:17
20M
20.00 mi13:19:442:28:537:2710:32
7:45
+0:06
21M
21.00 mi13:28:022:37:117:298:18
8:18
+0:33
35K
21.75 mi13:33:342:42:437:295:32
7:24
-0:54
23M
23.00 mi13:43:362:52:457:3110:02
8:01
+0:37
24M
24.00 mi13:51:253:00:347:317:49
7:49
-0:12
40K
24.85 mi13:58:333:07:427:337:08
8:21
+0:32
25.2M
25.20 mi14:02:003:11:097:353:27
10:00
+1:39
Finish
26.22 mi14:10:513:20:007:388:51
8:41
-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

7:11 /mi

Average Pace

7:38 /mi

Slowest Pace

10:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

4:54

2% of race

Time at Steady Pace

2:37:20

79% of race

Time at Slower Pace

37:46

19% of race

Average Pace: 7:38 /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 mi11:14:1123:207:3123:20
7:31
#12357
10K
6.21 mi11:36:5446:037:2522:43
7:19
#11336
15K
9.32 mi11:59:511:09:007:2422:57
7:23
#11099
20K
12.43 mi12:22:401:31:497:2322:49
7:21
#10651
Half
13.11 mi12:27:341:36:437:234:54
7:11
#10556
25K
15.53 mi12:45:261:54:357:2317:52
7:22
#10246
30K
18.64 mi13:09:122:18:217:2523:46
7:39
#9893
20M
20.00 mi13:19:442:28:537:2710:32
7:45
#9743
21M
21.00 mi13:28:022:37:117:298:18
8:18
#9689
35K
21.75 mi13:33:342:42:437:295:32
7:24
#9588
23M
23.00 mi13:43:362:52:457:3110:02
8:01
#9594
24M
24.00 mi13:51:253:00:347:317:49
7:49
#9593
40K
24.85 mi13:58:333:07:427:337:08
8:21
#9679
25.2M
25.20 mi14:02:003:11:097:353:27
10:00
#9815
Finish
26.22 mi14:10:513:20:007:388:51
8:41
#10150
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi123572991299110764(Top 38%)2251(Top 18%)2251(Top 41%)
10K6.21 mi3.10 mi11336+10212469+5222469+52210456(Top 37%)2039(Top 17%)2039(Top 37%)
15K9.32 mi3.11 mi11099+2372369+1002369+10010764(Top 38%)2251(Top 18%)2251(Top 41%)
20K12.43 mi3.11 mi10651+4482177+1922177+1929425(Top 33%)1706(Top 14%)1706(Top 31%)
Half13.11 mi0.68 mi10556+952126+512126+519031(Top 32%)1532(Top 13%)1532(Top 28%)
25K15.53 mi2.42 mi10246+3102024+1022024+1028932(Top 31%)1616(Top 13%)1616(Top 30%)
30K18.64 mi3.11 mi9893+3531904+1201904+1208839(Top 31%)1766(Top 14%)1766(Top 32%)
20M20.00 mi1.36 mi9743+1501876+281876+288748(Top 31%)1860(Top 15%)1860(Top 34%)
21M21.00 mi1.00 mi9689+541877-11877-19244(Top 33%)2268(Top 19%)2268(Top 41%)
35K21.75 mi0.75 mi9588+1011853+241853+247959(Top 28%)1676(Top 14%)1676(Top 31%)
23M23.00 mi1.25 mi9594-61905-521905-5210138(Top 36%)2805(Top 23%)2805(Top 51%)
24M24.00 mi1.00 mi9593+11945-401945-409949(Top 35%)2779(Top 23%)2779(Top 51%)
40K24.85 mi0.85 mi9679-862017-722017-7212426(Top 44%)4135(Top 34%)4135(Top 76%)
25.2M25.20 mi0.35 mi9815-1362109-922109-9217053(Top 60%)6591(Top 54%)6591(Top 121%)
Finish26.22 mi1.02 mi10150-3352296-1872296-18717386(Top 61%)6742(Top 55%)6742(Top 123%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21stories
+97ft-345ft

Overall

10764

Females

2251

F18-39

2251

5K→10K

3.1 - 6.2 mi

Top 37%
×5stories
+79ft-138ft

Overall

10456

Females

2039

F18-39

2039

10K→15K

6.2 - 9.3 mi

Top 38%
×3stories
+67ft-78ft

Overall

10764

Females

2251

F18-39

2251

15K→20K

9.3 - 12.4 mi

Top 33%
×5stories
+106ft-86ft

Overall

9425

Females

1706

F18-39

1706

20K→Half

12.4 - 13.1 mi

Top 32%
×2stories
+19ft-37ft

Overall

9031

Females

1532

F18-39

1532

Half→25K

13.1 - 15.5 mi

Top 31%
×4stories
+66ft-88ft

Overall

8932

Females

1616

F18-39

1616

25K→30K

15.5 - 18.6 mi

Top 31%
×9stories
+181ft-148ft

Overall

8839

Females

1766

F18-39

1766

30K→20M

18.6 - 20.0 mi

Top 31%
×5stories
+64ft-50ft

Overall

8748

Females

1860

F18-39

1860

20M→21M

20.0 - 21.0 mi

Top 33%
×8stories
+106ft-24ft

Overall

9244

Females

2268

F18-39

2268

21M→35K

21.0 - 21.8 mi

Top 28%
×7stories
+17ft-86ft

Overall

7959

Females

1676

F18-39

1676

35K→23M

21.8 - 23.0 mi

Top 36%
×5stories
+23ft-63ft

Overall

10138

Females

2805

F18-39

2805

23M→24M

23.0 - 24.0 mi

Top 35%
×6stories
+12ft-82ft

Overall

9949

Females

2779

F18-39

2779

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

12426

Females

4135

F18-39

4135

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

17053

Females

6591

F18-39

6591

25.2M→Finish

25.2 - 26.2 mi

Top 61%
×2stories
+22ft-21ft

Overall

17386

Females

6742

F18-39

6742

Passing Analysis

Category:
Athletes Passed
3364*
Passed By
1154
Net Change
+2207
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12357
5K → 10K104928+1021#12357#11336
10K → 15K31376+237#11336#11099
15K → 20K46416+448#11099#10651
20K → Half994+95#10651#10556
Half → 25K33222+310#10556#10246
25K → 30K420*67+353#10246#9893
30K → 20M18938+150#9893#9743
20M → 21M11561+54#9743#9689
21M → 35K11110+101#9689#9588
35K → 23M107113-6#9588#9594
23M → 24M8988+1#9594#9593
24M → 40K48134-86#9593#9679
40K → 25.2M11147-136#9679#9815
25.2M → Finish17350-335#9815#10150
TOTALS3364*1154+2207

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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