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BOSTON MARATHON 2025

Laura Blackwell

Bib: 12629•F

GA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 29%
Gender (Female)
#0 / 12228
Top 12%
Masters (Masters Women)
#0 / 6759
Top 4%
Division (F40-44)
#0 / 1718
Top 9%
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
7:14/mi
22:29
↑ 97↓ 3451.5%
10K· 6.21 mi
7:17/mi
45:08
↑ 79↓ 1380.4%
15K· 9.32 mi
7:15/mi
1:07:41
↑ 67↓ 78
20K· 12.43 mi
7:15/mi
1:30:12
↑ 106↓ 860.1%
Half· 13.11 mi
7:12/mi
1:35:07
↑ 19↓ 370.5%
25K· 15.53 mi
7:16/mi
1:52:43
↑ 66↓ 880.2%
30K· 18.64 mi
7:27/mi
2:15:51
↑ 181↓ 1480.2%
20M
7:30/mi
2:26:02
↑ 64↓ 500.2%
21M
7:59/mi
2:34:01
↑ 106↓ 241.6%
35K· 21.75 mi
7:21/mi
2:39:31
↑ 17↓ 861.7%
23M
7:37/mi
2:49:03
↑ 23↓ 630.6%
24M
7:25/mi
2:56:28
↓ 821.3%
40K· 24.85 mi
7:48/mi
3:03:08
↓ 200.3%
25.2M
8:45/mi
3:06:09
↑ 13↓ 160.2%
Finish· 26.22 mi
7:59/mi
3:14:17
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:07
Pace7:15 /mi
2nd Half
Distance13.11 mi
Time1:39:10
Pace7:34 /mi
📊Positive Split: 4.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:0222:297:1422:29
7:14
-
10K
6.21 mi11:12:4145:087:1622:39
7:17
+0:03
15K
9.32 mi11:35:141:07:417:1622:33
7:15
-0:02
20K
12.43 mi11:57:451:30:127:1522:31
7:15
0:00
Half
13.11 mi12:02:401:35:077:154:55
7:12
-0:03
25K
15.53 mi12:20:161:52:437:1517:36
7:16
+0:04
30K
18.64 mi12:43:242:15:517:1723:08
7:27
+0:11
20M
20.00 mi12:53:352:26:027:1810:11
7:30
+0:03
21M
21.00 mi13:01:342:34:017:207:59
7:59
+0:29
35K
21.75 mi13:07:042:39:317:205:30
7:21
-0:38
23M
23.00 mi13:16:362:49:037:219:32
7:37
+0:16
24M
24.00 mi13:24:012:56:287:217:25
7:25
-0:12
40K
24.85 mi13:30:413:03:087:226:40
7:48
+0:23
25.2M
25.20 mi13:33:423:06:097:233:01
8:45
+0:57
Finish
26.22 mi13:41:503:14:177:258:08
7:59
-0:46

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

7:12 /mi

Average Pace

7:25 /mi

Slowest Pace

8:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

4:55

3% of race

Time at Steady Pace

2:43:34

84% of race

Time at Slower Pace

25:48

13% of race

Average Pace: 7:25 /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 mi10:50:0222:297:1422:29
7:14
#9808
10K
6.21 mi11:12:4145:087:1622:39
7:17
#10022
15K
9.32 mi11:35:141:07:417:1622:33
7:15
#9874
20K
12.43 mi11:57:451:30:127:1522:31
7:15
#9489
Half
13.11 mi12:02:401:35:077:154:55
7:12
#9451
25K
15.53 mi12:20:161:52:437:1517:36
7:16
#9187
30K
18.64 mi12:43:242:15:517:1723:08
7:27
#8732
20M
20.00 mi12:53:352:26:027:1810:11
7:30
#8540
21M
21.00 mi13:01:342:34:017:207:59
7:59
#8414
35K
21.75 mi13:07:042:39:317:205:30
7:21
#8353
23M
23.00 mi13:16:362:49:037:219:32
7:37
#8228
24M
24.00 mi13:24:012:56:287:217:25
7:25
#8136
40K
24.85 mi13:30:413:03:087:226:40
7:48
#8131
25.2M
25.20 mi13:33:423:06:097:233:01
8:45
#8152
Finish
26.22 mi13:41:503:14:177:258:08
7:59
#8325
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi9808172117219641(Top 34%)1722(Top 14%)1722(Top 100%)
10K6.21 mi3.10 mi10022-2141819-981819-9810276(Top 36%)1951(Top 16%)1951(Top 114%)
15K9.32 mi3.11 mi9874+1481781+381781+389641(Top 34%)1722(Top 14%)1722(Top 100%)
20K12.43 mi3.11 mi9489+3851634+1471634+1478616(Top 30%)1360(Top 11%)1360(Top 79%)
Half13.11 mi0.68 mi9451+381625+91625+99192(Top 32%)1577(Top 13%)1577(Top 92%)
25K15.53 mi2.42 mi9187+2641538+871538+878077(Top 28%)1246(Top 10%)1246(Top 73%)
30K18.64 mi3.11 mi8732+4551388+1501388+1507368(Top 26%)1153(Top 9%)1153(Top 67%)
20M20.00 mi1.36 mi8540+1921348+401348+407000(Top 25%)1156(Top 9%)1156(Top 67%)
21M21.00 mi1.00 mi8414+1261335+131335+137285(Top 26%)1425(Top 12%)1425(Top 83%)
35K21.75 mi0.75 mi8353+611328+71328+77602(Top 27%)1531(Top 13%)1531(Top 89%)
23M23.00 mi1.25 mi8228+1251322+61322+67356(Top 26%)1555(Top 13%)1555(Top 91%)
24M24.00 mi1.00 mi8136+921326-41326-47169(Top 25%)1524(Top 12%)1524(Top 89%)
40K24.85 mi0.85 mi8131+51353-271353-278759(Top 31%)2329(Top 19%)2329(Top 136%)
25.2M25.20 mi0.35 mi8152-211373-201373-2010316(Top 36%)3152(Top 26%)3152(Top 183%)
Finish26.22 mi1.02 mi8325-1731481-1081481-10812761(Top 45%)4304(Top 35%)4304(Top 251%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21story building
+97ft-345ft

Overall

9641

Females

1722

F40-44

1722

5K→10K

3.1 - 6.2 mi

Top 36%
×5story building
+79ft-138ft

Overall

10276

Females

1951

F40-44

1951

10K→15K

6.2 - 9.3 mi

Top 34%
×3story building
+67ft-78ft

Overall

9641

Females

1722

F40-44

1722

15K→20K

9.3 - 12.4 mi

Top 30%
×5story building
+106ft-86ft

Overall

8616

Females

1360

F40-44

1360

20K→Half

12.4 - 13.1 mi

Top 32%
×2story building
+19ft-37ft

Overall

9192

Females

1577

F40-44

1577

Half→25K

13.1 - 15.5 mi

Top 28%
×4story building
+66ft-88ft

Overall

8077

Females

1246

F40-44

1246

25K→30K

15.5 - 18.6 mi

Top 26%
×9story building
+181ft-148ft

Overall

7368

Females

1153

F40-44

1153

30K→20M

18.6 - 20.0 mi

Top 25%
×5story building
+64ft-50ft

Overall

7000

Females

1156

F40-44

1156

20M→21M

20.0 - 21.0 mi

Top 26%
×8story building
+106ft-24ft

Overall

7285

Females

1425

F40-44

1425

21M→35K

21.0 - 21.8 mi

Top 27%
×7story building
+17ft-86ft

Overall

7602

Females

1531

F40-44

1531

35K→23M

21.8 - 23.0 mi

Top 26%
×5story building
+23ft-63ft

Overall

7356

Females

1555

F40-44

1555

23M→24M

23.0 - 24.0 mi

Top 25%
×6story building
+12ft-82ft

Overall

7169

Females

1524

F40-44

1524

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8759

Females

2329

F40-44

2329

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

10316

Females

3152

F40-44

3152

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2story building
+22ft-21ft

Overall

12761

Females

4304

F40-44

4304

Passing Analysis

Category:
Athletes Passed
2507*
Passed By
1022
Net Change
+1483
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9808
5K → 10K144356-214#9808#10022
10K → 15K246*98+148#10022#9874
15K → 20K40823+385#9874#9489
20K → Half5618+38#9489#9451
Half → 25K29632+264#9451#9187
25K → 30K49742+455#9187#8732
30K → 20M2019+192#8732#8540
20M → 21M16236+126#8540#8414
21M → 35K9029+61#8414#8353
35K → 23M17045+125#8353#8228
23M → 24M12230+92#8228#8136
24M → 40K6560+5#8136#8131
40K → 25.2M2142-21#8131#8152
25.2M → Finish29202-173#8152#8325
TOTALS2507*1022+1483

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

📊

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