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BOSTON MARATHON 2025

Ansley Pfeiffer

Bib: 15971•F

VA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 44%
Gender (Female)
#0 / 12228
Top 28%
Division (F18-39)
#0 / 5469
Top 47%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:30
Rank: #15555
Start → 5K
24:30 | 7:53/mi
10K· 6.21 mi
48:59
Rank: #15504 (+51)
5K → 10K
24:29 | 7:53/mi
15K· 9.32 mi
1:13:08
Rank: #15052 (+452)
10K → 15K
24:09 | 7:46/mi
20K· 12.43 mi
1:37:20
Rank: #14508 (+544)
15K → 20K
24:12 | 7:47/mi
Half· 13.11 mi
1:42:37
Rank: #14454 (+54)
20K → Half
5:17 | 7:45/mi
25K· 15.53 mi
2:01:37
Rank: #14120 (+334)
Half → 25K
19:00 | 7:50/mi
30K· 18.64 mi
2:26:57
Rank: #13743 (+377)
25K → 30K
25:20 | 8:09/mi
20M
2:38:07
Rank: #13566 (+177)
30K → 20M
11:10 | 8:13/mi
21M
2:46:39
Rank: #13365 (+201)
20M → 21M
8:32 | 8:32/mi
35K· 21.75 mi
2:52:38
Rank: #13316 (+49)
21M → 35K
5:59 | 8:00/mi
23M
3:02:44
Rank: #13103 (+213)
35K → 23M
10:06 | 8:04/mi
24M
3:10:32
Rank: #12959 (+144)
23M → 24M
7:48 | 7:48/mi
40K· 24.85 mi
3:17:05
Rank: #12723 (+236)
24M → 40K
6:33 | 7:40/mi
25.2M
3:19:57
Rank: #12630 (+93)
40K → 25.2M
2:52 | 8:19/mi
Finish· 26.22 mi
3:27:25
Rank: #12418 (+212)
25.2M → Finish
7:28 | 7:20/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:37
Pace7:50 /mi
2nd Half
Distance13.11 mi
Time1:44:48
Pace8:00 /mi
📊Positive Split: 2.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:0924:307:5324:30
7:53
-
10K
6.21 mi11:20:3848:597:5324:29
7:53
0:00
15K
9.32 mi11:44:471:13:087:5124:09
7:46
-0:07
20K
12.43 mi12:08:591:37:207:5024:12
7:47
+0:01
Half
13.11 mi12:14:161:42:377:505:17
7:45
-0:02
25K
15.53 mi12:33:162:01:377:5019:00
7:50
+0:05
30K
18.64 mi12:58:362:26:577:5325:20
8:09
+0:19
20M
20.00 mi13:09:462:38:077:5411:10
8:13
+0:04
21M
21.00 mi13:18:182:46:397:568:32
8:32
+0:19
35K
21.75 mi13:24:172:52:387:565:59
8:00
-0:32
23M
23.00 mi13:34:233:02:447:5710:06
8:04
+0:04
24M
24.00 mi13:42:113:10:327:567:48
7:48
-0:16
40K
24.85 mi13:48:443:17:057:566:33
7:40
-0:08
25.2M
25.20 mi13:51:363:19:577:562:52
8:19
+0:39
Finish
26.22 mi13:59:043:27:257:557:28
7:20
-0:59

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

7:20 /mi

Average Pace

7:55 /mi

Slowest Pace

8:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:39:31

77% of race

Time at Steady Pace

47:54

23% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:55 /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 mi10:56:0924:307:5324:30
7:53
#15555
10K
6.21 mi11:20:3848:597:5324:29
7:53
#15504
15K
9.32 mi11:44:471:13:087:5124:09
7:46
#15052
20K
12.43 mi12:08:591:37:207:5024:12
7:47
#14508
Half
13.11 mi12:14:161:42:377:505:17
7:45
#14454
25K
15.53 mi12:33:162:01:377:5019:00
7:50
#14120
30K
18.64 mi12:58:362:26:577:5325:20
8:09
#13743
20M
20.00 mi13:09:462:38:077:5411:10
8:13
#13566
21M
21.00 mi13:18:182:46:397:568:32
8:32
#13365
35K
21.75 mi13:24:172:52:387:565:59
8:00
#13316
23M
23.00 mi13:34:233:02:447:5710:06
8:04
#13103
24M
24.00 mi13:42:113:10:327:567:48
7:48
#12959
40K
24.85 mi13:48:443:17:057:566:33
7:40
#12723
25.2M
25.20 mi13:51:363:19:577:562:52
8:19
#12630
Finish
26.22 mi13:59:043:27:257:557:28
7:20
#12418
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi155554862486214142(Top 50%)4099(Top 34%)4099(Top 75%)
10K6.21 mi3.10 mi15504+514840+224840+2215530(Top 55%)4846(Top 40%)4846(Top 89%)
15K9.32 mi3.11 mi15052+4524587+2534587+25314142(Top 50%)4099(Top 34%)4099(Top 75%)
20K12.43 mi3.11 mi14508+5444292+2954292+29513202(Top 46%)3655(Top 30%)3655(Top 67%)
Half13.11 mi0.68 mi14454+544269+234269+2313807(Top 49%)3946(Top 32%)3946(Top 72%)
25K15.53 mi2.42 mi14120+3344110+1594110+15912649(Top 45%)3473(Top 28%)3473(Top 64%)
30K18.64 mi3.11 mi13743+3773961+1493961+14912492(Top 44%)3559(Top 29%)3559(Top 65%)
20M20.00 mi1.36 mi13566+1773886+753886+7511932(Top 42%)3408(Top 28%)3408(Top 62%)
21M21.00 mi1.00 mi13365+2013813+733813+7310726(Top 38%)2974(Top 24%)2974(Top 54%)
35K21.75 mi0.75 mi13316+493807+63807+612277(Top 43%)3784(Top 31%)3784(Top 69%)
23M23.00 mi1.25 mi13103+2133727+803727+8010543(Top 37%)3018(Top 25%)3018(Top 55%)
24M24.00 mi1.00 mi12959+1443682+453682+459855(Top 35%)2743(Top 22%)2743(Top 50%)
40K24.85 mi0.85 mi12723+2363575+1073575+1077888(Top 28%)1953(Top 16%)1953(Top 36%)
25.2M25.20 mi0.35 mi12630+933538+373538+377818(Top 28%)2007(Top 16%)2007(Top 37%)
Finish26.22 mi1.02 mi12418+2123459+793459+798008(Top 28%)2083(Top 17%)2083(Top 38%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21stories
+97ft-345ft

Overall

14142

Females

4099

F18-39

4099

5K→10K

3.1 - 6.2 mi

Top 55%
×5stories
+79ft-138ft

Overall

15530

Females

4846

F18-39

4846

10K→15K

6.2 - 9.3 mi

Top 50%
×3stories
+67ft-78ft

Overall

14142

Females

4099

F18-39

4099

15K→20K

9.3 - 12.4 mi

Top 46%
×5stories
+106ft-86ft

Overall

13202

Females

3655

F18-39

3655

20K→Half

12.4 - 13.1 mi

Top 49%
×2stories
+19ft-37ft

Overall

13807

Females

3946

F18-39

3946

Half→25K

13.1 - 15.5 mi

Top 45%
×4stories
+66ft-88ft

Overall

12649

Females

3473

F18-39

3473

25K→30K

15.5 - 18.6 mi

Top 44%
×9stories
+181ft-148ft

Overall

12492

Females

3559

F18-39

3559

30K→20M

18.6 - 20.0 mi

Top 42%
×5stories
+64ft-50ft

Overall

11932

Females

3408

F18-39

3408

20M→21M

20.0 - 21.0 mi

Top 38%
×8stories
+106ft-24ft

Overall

10726

Females

2974

F18-39

2974

21M→35K

21.0 - 21.8 mi

Top 43%
×7stories
+17ft-86ft

Overall

12277

Females

3784

F18-39

3784

35K→23M

21.8 - 23.0 mi

Top 37%
×5stories
+23ft-63ft

Overall

10543

Females

3018

F18-39

3018

23M→24M

23.0 - 24.0 mi

Top 35%
×6stories
+12ft-82ft

Overall

9855

Females

2743

F18-39

2743

24M→40K

24.0 - 24.9 mi

Top 28%
×1story
+6ft-20ft

Overall

7888

Females

1953

F18-39

1953

40K→25.2M

24.9 - 25.2 mi

Top 28%
×1story
+13ft-16ft

Overall

7818

Females

2007

F18-39

2007

25.2M→Finish

25.2 - 26.2 mi

Top 28%
×2stories
+22ft-21ft

Overall

8008

Females

2083

F18-39

2083

Passing Analysis

Category:
Athletes Passed
3722
Passed By
585
Net Change
+3137
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15555
5K → 10K340289+51#15555#15504
10K → 15K49139+452#15504#15052
15K → 20K56016+544#15052#14508
20K → Half6814+54#14508#14454
Half → 25K35622+334#14454#14120
25K → 30K45174+377#14120#13743
30K → 20M21033+177#13743#13566
20M → 21M21514+201#13566#13365
21M → 35K8839+49#13365#13316
35K → 23M23219+213#13316#13103
23M → 24M15915+144#13103#12959
24M → 40K2371+236#12959#12723
40K → 25.2M941+93#12723#12630
25.2M → Finish2219+212#12630#12418
TOTALS3722585+3137
📊

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