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BOSTON MARATHON 2025

Alexa Carlson

Bib: 25997•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
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
10:27/mi
32:28
↑ 97↓ 3451.5%
10K· 6.21 mi
10:20/mi
1:04:33
↑ 79↓ 1380.4%
15K· 9.32 mi
10:59/mi
1:38:40
↑ 67↓ 78
20K· 12.43 mi
12:00/mi
2:15:57
↑ 106↓ 860.1%
Half· 13.11 mi
11:55/mi
2:24:05
↑ 19↓ 370.5%
25K· 15.53 mi
10:58/mi
2:50:41
↑ 66↓ 880.2%
30K· 18.64 mi
11:54/mi
3:27:38
↑ 181↓ 1480.2%
20M
11:11/mi
3:42:50
↑ 64↓ 500.2%
21M
13:11/mi
3:56:01
↑ 106↓ 241.6%
35K· 21.75 mi
11:02/mi
4:04:16
↑ 17↓ 861.7%
23M
10:58/mi
4:18:00
↑ 23↓ 630.6%
24M
10:32/mi
4:28:32
↓ 821.3%
40K· 24.85 mi
11:37/mi
4:38:28
↓ 200.3%
25.2M
13:26/mi
4:43:06
↑ 13↓ 160.2%
Finish· 26.22 mi
10:21/mi
4:53:39
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:24:05
Pace10:59 /mi
2nd Half
Distance13.11 mi
Time2:29:34
Pace11:25 /mi
📊Positive Split: 3.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:0632:2810:2732:28
10:27
-
10K
6.21 mi12:21:111:04:3310:2332:05
10:20
-0:07
15K
9.32 mi12:55:181:38:4010:3534:07
10:59
+0:39
20K
12.43 mi13:32:352:15:5710:5637:17
12:00
+1:01
Half
13.11 mi13:40:432:24:0510:598:08
11:55
-0:05
25K
15.53 mi14:07:192:50:4110:5926:36
10:58
-0:57
30K
18.64 mi14:44:163:27:3811:0836:57
11:54
+0:56
20M
20.00 mi14:59:283:42:5011:0815:12
11:11
-0:43
21M
21.00 mi15:12:393:56:0111:1413:11
13:11
+2:00
35K
21.75 mi15:20:544:04:1611:148:15
11:02
-2:09
23M
23.00 mi15:34:384:18:0011:1313:44
10:58
-0:04
24M
24.00 mi15:45:104:28:3211:1110:32
10:32
-0:26
40K
24.85 mi15:55:064:38:2811:129:56
11:37
+1:05
25.2M
25.20 mi15:59:444:43:0611:144:38
13:26
+1:49
Finish
26.22 mi16:10:174:53:3911:1210:33
10:21
-3:05

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

10:20 /mi

Average Pace

11:12 /mi

Slowest Pace

13:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:25:38

29% of race

Time at Steady Pace

1:37:54

33% of race

Time at Slower Pace

1:50:07

37% of race

Average Pace: 11:12 /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 mi11:49:0632:2810:2732:28
10:27
#26643
10K
6.21 mi12:21:111:04:3310:2332:05
10:20
#26263
15K
9.32 mi12:55:181:38:4010:3534:07
10:59
#26434
20K
12.43 mi13:32:352:15:5710:5637:17
12:00
#26699
Half
13.11 mi13:40:432:24:0510:598:08
11:55
#26749
25K
15.53 mi14:07:192:50:4110:5926:36
10:58
#26476
30K
18.64 mi14:44:163:27:3811:0836:57
11:54
#26285
20M
20.00 mi14:59:283:42:5011:0815:12
11:11
#26131
21M
21.00 mi15:12:393:56:0111:1413:11
13:11
#26101
35K
21.75 mi15:20:544:04:1611:148:15
11:02
#26045
23M
23.00 mi15:34:384:18:0011:1313:44
10:58
#25929
24M
24.00 mi15:45:104:28:3211:1110:32
10:32
#25832
40K
24.85 mi15:55:064:38:2811:129:56
11:37
#25797
25.2M
25.20 mi15:59:444:43:0611:144:38
13:26
#25804
Finish
26.22 mi16:10:174:53:3911:1210:33
10:21
#25774
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi26643111201112026650(Top 94%)11161(Top 91%)11161(Top 204%)
10K6.21 mi3.10 mi26263+38010914+20610914+20625960(Top 91%)10768(Top 88%)10768(Top 197%)
15K9.32 mi3.11 mi26434-17111017-10311017-10326650(Top 94%)11161(Top 91%)11161(Top 204%)
20K12.43 mi3.11 mi26699-26511176-15911176-15927119(Top 95%)11468(Top 94%)11468(Top 210%)
Half13.11 mi0.68 mi26749-5011209-3311209-3327383(Top 96%)11634(Top 95%)11634(Top 213%)
25K15.53 mi2.42 mi26476+27311065+14411065+14425164(Top 89%)10384(Top 85%)10384(Top 190%)
30K18.64 mi3.11 mi26285+19110972+9310972+9325437(Top 90%)10639(Top 87%)10639(Top 195%)
20M20.00 mi1.36 mi26131+15410910+6210910+6223952(Top 84%)9938(Top 81%)9938(Top 182%)
21M21.00 mi1.00 mi26101+3010907+310907+325283(Top 89%)10712(Top 88%)10712(Top 196%)
35K21.75 mi0.75 mi26045+5610882+2510882+2524230(Top 85%)10187(Top 83%)10187(Top 186%)
23M23.00 mi1.25 mi25929+11610824+5810824+5823138(Top 81%)9687(Top 79%)9687(Top 177%)
24M24.00 mi1.00 mi25832+9710787+3710787+3722888(Top 81%)9591(Top 78%)9591(Top 175%)
40K24.85 mi0.85 mi25797+3510783+410783+424319(Top 86%)10338(Top 85%)10338(Top 189%)
25.2M25.20 mi0.35 mi25804-710789-610789-625564(Top 90%)10982(Top 90%)10982(Top 201%)
Finish26.22 mi1.02 mi25774+3010781+810781+823896(Top 84%)10124(Top 83%)10124(Top 185%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 94%
×21story building
+97ft-345ft

Overall

26650

Females

11161

F18-39

11161

5K→10K

3.1 - 6.2 mi

Top 91%
×5story building
+79ft-138ft

Overall

25960

Females

10768

F18-39

10768

10K→15K

6.2 - 9.3 mi

Top 94%
×3story building
+67ft-78ft

Overall

26650

Females

11161

F18-39

11161

15K→20K

9.3 - 12.4 mi

Top 95%
×5story building
+106ft-86ft

Overall

27119

Females

11468

F18-39

11468

20K→Half

12.4 - 13.1 mi

Top 96%
×2story building
+19ft-37ft

Overall

27383

Females

11634

F18-39

11634

Half→25K

13.1 - 15.5 mi

Top 89%
×4story building
+66ft-88ft

Overall

25164

Females

10384

F18-39

10384

25K→30K

15.5 - 18.6 mi

Top 90%
×9story building
+181ft-148ft

Overall

25437

Females

10639

F18-39

10639

30K→20M

18.6 - 20.0 mi

Top 84%
×5story building
+64ft-50ft

Overall

23952

Females

9938

F18-39

9938

20M→21M

20.0 - 21.0 mi

Top 89%
×8story building
+106ft-24ft

Overall

25283

Females

10712

F18-39

10712

21M→35K

21.0 - 21.8 mi

Top 85%
×7story building
+17ft-86ft

Overall

24230

Females

10187

F18-39

10187

35K→23M

21.8 - 23.0 mi

Top 81%
×5story building
+23ft-63ft

Overall

23138

Females

9687

F18-39

9687

23M→24M

23.0 - 24.0 mi

Top 81%
×6story building
+12ft-82ft

Overall

22888

Females

9591

F18-39

9591

24M→40K

24.0 - 24.9 mi

Top 86%
×1story
+6ft-20ft

Overall

24319

Females

10338

F18-39

10338

40K→25.2M

24.9 - 25.2 mi

Top 90%
×1story
+13ft-16ft

Overall

25564

Females

10982

F18-39

10982

25.2M→Finish

25.2 - 26.2 mi

Top 84%
×2story building
+22ft-21ft

Overall

23896

Females

10124

F18-39

10124

Passing Analysis

Category:
Athletes Passed
1636
Passed By
767
Net Change
+869
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26643
5K → 10K42545+380#26643#26263
10K → 15K79250-171#26263#26434
15K → 20K41306-265#26434#26699
20K → Half959-50#26699#26749
Half → 25K2774+273#26749#26476
25K → 30K21625+191#26476#26285
30K → 20M1551+154#26285#26131
20M → 21M5626+30#26131#26101
21M → 35K637+56#26101#26045
35K → 23M1182+116#26045#25929
23M → 24M1003+97#25929#25832
24M → 40K4712+35#25832#25797
40K → 25.2M916-7#25797#25804
25.2M → Finish4111+30#25804#25774
TOTALS1636767+869
📊

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