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BOSTON MARATHON 2025

Lauren Alpers

Bib: 15387•F

SD

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 47%
Gender (Female)
#0 / 12228
Top 33%
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
7:41/mi
23:51
↑ 97↓ 3451.5%
10K· 6.21 mi
7:44/mi
47:53
↑ 79↓ 1380.4%
15K· 9.32 mi
7:47/mi
1:12:05
↑ 67↓ 78
20K· 12.43 mi
7:49/mi
1:36:23
↑ 106↓ 860.1%
Half· 13.11 mi
7:46/mi
1:41:41
↑ 19↓ 370.5%
25K· 15.53 mi
8:15/mi
2:01:41
↑ 66↓ 880.2%
30K· 18.64 mi
8:49/mi
2:29:03
↑ 181↓ 1480.2%
20M
8:06/mi
2:40:03
↑ 64↓ 500.2%
21M
8:29/mi
2:48:32
↑ 106↓ 241.6%
35K· 21.75 mi
7:56/mi
2:54:28
↑ 17↓ 861.7%
23M
8:21/mi
3:04:55
↑ 23↓ 630.6%
24M
8:07/mi
3:13:02
↓ 821.3%
40K· 24.85 mi
8:25/mi
3:20:14
↓ 200.3%
25.2M
8:48/mi
3:23:16
↑ 13↓ 160.2%
Finish· 26.22 mi
7:34/mi
3:30:59
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:41
Pace7:45 /mi
2nd Half
Distance13.11 mi
Time1:49:18
Pace8:20 /mi
📊Positive Split: 7.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:4123:517:4123:51
7:41
-
10K
6.21 mi11:20:4347:537:4224:02
7:44
+0:03
15K
9.32 mi11:44:551:12:057:4424:12
7:47
+0:03
20K
12.43 mi12:09:131:36:237:4524:18
7:49
+0:02
Half
13.11 mi12:14:311:41:417:455:18
7:46
-0:03
25K
15.53 mi12:34:312:01:417:5020:00
8:15
+0:29
30K
18.64 mi13:01:532:29:038:0027:22
8:49
+0:34
20M
20.00 mi13:12:532:40:038:0011:00
8:06
-0:43
21M
21.00 mi13:21:222:48:328:028:29
8:29
+0:23
35K
21.75 mi13:27:182:54:288:015:56
7:56
-0:33
23M
23.00 mi13:37:453:04:558:0210:27
8:21
+0:25
24M
24.00 mi13:45:523:13:028:038:07
8:07
-0:14
40K
24.85 mi13:53:043:20:148:037:12
8:25
+0:18
25.2M
25.20 mi13:56:063:23:168:043:02
8:48
+0:23
Finish
26.22 mi14:03:493:30:598:037:43
7:34
-1:14

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

7:34 /mi

Average Pace

8:03 /mi

Slowest Pace

8:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:34:27

73% of race

Time at Steady Pace

56:32

27% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:03 /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 mi10:56:4123:517:4123:51
7:41
#13776
10K
6.21 mi11:20:4347:537:4224:02
7:44
#13959
15K
9.32 mi11:44:551:12:057:4424:12
7:47
#14058
20K
12.43 mi12:09:131:36:237:4524:18
7:49
#13865
Half
13.11 mi12:14:311:41:417:455:18
7:46
#13869
25K
15.53 mi12:34:312:01:417:5020:00
8:15
#14162
30K
18.64 mi13:01:532:29:038:0027:22
8:49
#14701
20M
20.00 mi13:12:532:40:038:0011:00
8:06
#14344
21M
21.00 mi13:21:222:48:328:028:29
8:29
#14050
35K
21.75 mi13:27:182:54:288:015:56
7:56
#13943
23M
23.00 mi13:37:453:04:558:0210:27
8:21
#13845
24M
24.00 mi13:45:523:13:028:038:07
8:07
#13744
40K
24.85 mi13:53:043:20:148:037:12
8:25
#13683
25.2M
25.20 mi13:56:063:23:168:043:02
8:48
#13633
Finish
26.22 mi14:03:493:30:598:037:43
7:34
#13474
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi137763761376114293(Top 50%)4196(Top 34%)4196(Top 77%)
10K6.21 mi3.10 mi13959-1833915-1543915-15414219(Top 50%)4090(Top 33%)4090(Top 75%)
15K9.32 mi3.11 mi14058-994009-944009-9414293(Top 50%)4196(Top 34%)4196(Top 77%)
20K12.43 mi3.11 mi13865+1933933+763933+7613460(Top 47%)3793(Top 31%)3793(Top 69%)
Half13.11 mi0.68 mi13869-43940-73940-714052(Top 49%)4085(Top 33%)4085(Top 75%)
25K15.53 mi2.42 mi14162-2934135-1954135-19515617(Top 55%)5077(Top 42%)5077(Top 93%)
30K18.64 mi3.11 mi14701-5394505-3704505-37016654(Top 59%)5830(Top 48%)5830(Top 107%)
20M20.00 mi1.36 mi14344+3574324+1814324+18111108(Top 39%)3005(Top 25%)3005(Top 55%)
21M21.00 mi1.00 mi14050+2944193+1314193+13110393(Top 37%)2823(Top 23%)2823(Top 52%)
35K21.75 mi0.75 mi13943+1074156+374156+3711827(Top 42%)3566(Top 29%)3566(Top 65%)
23M23.00 mi1.25 mi13845+984142+144142+1412339(Top 43%)3922(Top 32%)3922(Top 72%)
24M24.00 mi1.00 mi13744+1014115+274115+2712052(Top 42%)3831(Top 31%)3831(Top 70%)
40K24.85 mi0.85 mi13683+614106+94106+912946(Top 46%)4408(Top 36%)4408(Top 81%)
25.2M25.20 mi0.35 mi13633+504091+154091+1510704(Top 38%)3360(Top 27%)3360(Top 61%)
Finish26.22 mi1.02 mi13474+1594021+704021+709780(Top 34%)2898(Top 24%)2898(Top 53%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21story building
+97ft-345ft

Overall

14293

Females

4196

F18-39

4196

5K→10K

3.1 - 6.2 mi

Top 50%
×5story building
+79ft-138ft

Overall

14219

Females

4090

F18-39

4090

10K→15K

6.2 - 9.3 mi

Top 50%
×3story building
+67ft-78ft

Overall

14293

Females

4196

F18-39

4196

15K→20K

9.3 - 12.4 mi

Top 47%
×5story building
+106ft-86ft

Overall

13460

Females

3793

F18-39

3793

20K→Half

12.4 - 13.1 mi

Top 49%
×2story building
+19ft-37ft

Overall

14052

Females

4085

F18-39

4085

Half→25K

13.1 - 15.5 mi

Top 55%
×4story building
+66ft-88ft

Overall

15617

Females

5077

F18-39

5077

25K→30K

15.5 - 18.6 mi

Top 59%
×9story building
+181ft-148ft

Overall

16654

Females

5830

F18-39

5830

30K→20M

18.6 - 20.0 mi

Top 39%
×5story building
+64ft-50ft

Overall

11108

Females

3005

F18-39

3005

20M→21M

20.0 - 21.0 mi

Top 37%
×8story building
+106ft-24ft

Overall

10393

Females

2823

F18-39

2823

21M→35K

21.0 - 21.8 mi

Top 42%
×7story building
+17ft-86ft

Overall

11827

Females

3566

F18-39

3566

35K→23M

21.8 - 23.0 mi

Top 43%
×5story building
+23ft-63ft

Overall

12339

Females

3922

F18-39

3922

23M→24M

23.0 - 24.0 mi

Top 42%
×6story building
+12ft-82ft

Overall

12052

Females

3831

F18-39

3831

24M→40K

24.0 - 24.9 mi

Top 46%
×1story
+6ft-20ft

Overall

12946

Females

4408

F18-39

4408

40K→25.2M

24.9 - 25.2 mi

Top 38%
×1story
+13ft-16ft

Overall

10704

Females

3360

F18-39

3360

25.2M→Finish

25.2 - 26.2 mi

Top 34%
×2story building
+22ft-21ft

Overall

9780

Females

2898

F18-39

2898

Passing Analysis

Category:
Athletes Passed
2342
Passed By
2040
Net Change
+302
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13776
5K → 10K203386-183#13776#13959
10K → 15K166265-99#13959#14058
15K → 20K297104+193#14058#13865
20K → Half2832-4#13865#13869
Half → 25K102395-293#13869#14162
25K → 30K114653-539#14162#14701
30K → 20M3614+357#14701#14344
20M → 21M30511+294#14344#14050
21M → 35K12619+107#14050#13943
35K → 23M16163+98#13943#13845
23M → 24M13130+101#13845#13744
24M → 40K11352+61#13744#13683
40K → 25.2M6313+50#13683#13633
25.2M → Finish17213+159#13633#13474
TOTALS23422040+302
📊

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