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BOSTON MARATHON 2025

Alyssa Bak

Bib: 28102•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

Start
0:00:00
Race begins
5K· 3.11 mi
29:55
Rank: #24631
Start → 5K
29:55 | 9:38/mi
10K· 6.21 mi
58:57
Rank: #24144 (+487)
5K → 10K
29:02 | 9:21/mi
15K· 9.32 mi
1:27:43
Rank: #23783 (+361)
10K → 15K
28:46 | 9:16/mi
20K· 12.43 mi
1:56:35
Rank: #23395 (+388)
15K → 20K
28:52 | 9:17/mi
Half· 13.11 mi
2:02:52
Rank: #23349 (+46)
20K → Half
6:17 | 9:13/mi
25K· 15.53 mi
2:25:58
Rank: #23111 (+238)
Half → 25K
23:06 | 9:32/mi
30K· 18.64 mi
2:57:57
Rank: #22939 (+172)
25K → 30K
31:59 | 10:18/mi
20M
3:12:25
Rank: #22909 (+30)
30K → 20M
14:28 | 10:39/mi
21M
3:24:14
Rank: #22939 (-30)
20M → 21M
11:49 | 11:49/mi
35K· 21.75 mi
3:32:00
Rank: #22943 (-4)
21M → 35K
7:46 | 10:23/mi
23M
3:45:57
Rank: #22970 (-27)
35K → 23M
13:57 | 11:08/mi
24M
3:56:25
Rank: #22949 (+21)
23M → 24M
10:28 | 10:28/mi
40K· 24.85 mi
4:05:14
Rank: #22891 (+58)
24M → 40K
8:49 | 10:19/mi
25.2M
4:09:06
Rank: #22862 (+29)
40K → 25.2M
3:52 | 11:13/mi
Finish· 26.22 mi
4:19:15
Rank: #22868 (-6)
25.2M → Finish
10:09 | 9:58/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:02:52
Pace9:22 /mi
2nd Half
Distance13.11 mi
Time2:16:23
Pace10:24 /mi
📊Positive Split: 11.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:3229:559:3829:55
9:38
-
10K
6.21 mi12:18:3458:579:2929:02
9:21
-0:17
15K
9.32 mi12:47:201:27:439:2528:46
9:16
-0:05
20K
12.43 mi13:16:121:56:359:2328:52
9:17
+0:01
Half
13.11 mi13:22:292:02:529:226:17
9:13
-0:04
25K
15.53 mi13:45:352:25:589:2423:06
9:32
+0:19
30K
18.64 mi14:17:342:57:579:3331:59
10:18
+0:46
20M
20.00 mi14:32:023:12:259:3714:28
10:39
+0:21
21M
21.00 mi14:43:513:24:149:4411:49
11:49
+1:10
35K
21.75 mi14:51:373:32:009:457:46
10:23
-1:26
23M
23.00 mi15:05:343:45:579:4913:57
11:08
+0:45
24M
24.00 mi15:16:023:56:259:5110:28
10:28
-0:40
40K
24.85 mi15:24:514:05:149:528:49
10:19
-0:09
25.2M
25.20 mi15:28:434:09:069:533:52
11:13
+0:54
Finish
26.22 mi15:38:524:19:159:5410:09
9:58
-1:15

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

9:13 /mi

Average Pace

9:54 /mi

Slowest Pace

11:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:25:58

56% of race

Time at Steady Pace

1:23:39

32% of race

Time at Slower Pace

29:38

11% of race

Average Pace: 9:53 /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 mi11:49:3229:559:3829:55
9:38
#24631
10K
6.21 mi12:18:3458:579:2929:02
9:21
#24144
15K
9.32 mi12:47:201:27:439:2528:46
9:16
#23783
20K
12.43 mi13:16:121:56:359:2328:52
9:17
#23395
Half
13.11 mi13:22:292:02:529:226:17
9:13
#23349
25K
15.53 mi13:45:352:25:589:2423:06
9:32
#23111
30K
18.64 mi14:17:342:57:579:3331:59
10:18
#22939
20M
20.00 mi14:32:023:12:259:3714:28
10:39
#22909
21M
21.00 mi14:43:513:24:149:4411:49
11:49
#22939
35K
21.75 mi14:51:373:32:009:457:46
10:23
#22943
23M
23.00 mi15:05:343:45:579:4913:57
11:08
#22970
24M
24.00 mi15:16:023:56:259:5110:28
10:28
#22949
40K
24.85 mi15:24:514:05:149:528:49
10:19
#22891
25.2M
25.20 mi15:28:434:09:069:533:52
11:13
#22862
Finish
26.22 mi15:38:524:19:159:5410:09
9:58
#22868
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi24631100281002823080(Top 81%)9140(Top 75%)9140(Top 167%)
10K6.21 mi3.10 mi24144+4879763+2659763+26523671(Top 83%)9502(Top 78%)9502(Top 174%)
15K9.32 mi3.11 mi23783+3619564+1999564+19923080(Top 81%)9140(Top 75%)9140(Top 167%)
20K12.43 mi3.11 mi23395+3889336+2289336+22822252(Top 78%)8726(Top 71%)8726(Top 160%)
Half13.11 mi0.68 mi23349+469316+209316+2022672(Top 80%)8976(Top 73%)8976(Top 164%)
25K15.53 mi2.42 mi23111+2389202+1149202+11421961(Top 77%)8631(Top 71%)8631(Top 158%)
30K18.64 mi3.11 mi22939+1729149+539149+5322440(Top 79%)9019(Top 74%)9019(Top 165%)
20M20.00 mi1.36 mi22909+309163-149163-1422818(Top 80%)9324(Top 76%)9324(Top 170%)
21M21.00 mi1.00 mi22939-309195-329195-3223255(Top 82%)9633(Top 79%)9633(Top 176%)
35K21.75 mi0.75 mi22943-49210-159210-1522917(Top 81%)9511(Top 78%)9511(Top 174%)
23M23.00 mi1.25 mi22970-279244-349244-3423555(Top 83%)9876(Top 81%)9876(Top 181%)
24M24.00 mi1.00 mi22949+219258-149258-1422733(Top 80%)9502(Top 78%)9502(Top 174%)
40K24.85 mi0.85 mi22891+589253+59253+521432(Top 75%)8896(Top 73%)8896(Top 163%)
25.2M25.20 mi0.35 mi22862+299238+159238+1521318(Top 75%)8828(Top 72%)8828(Top 161%)
Finish26.22 mi1.02 mi22868-69254-169254-1622824(Top 80%)9582(Top 78%)9582(Top 175%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21stories
+97ft-345ft

Overall

23080

Females

9140

F18-39

9140

5K→10K

3.1 - 6.2 mi

Top 83%
×5stories
+79ft-138ft

Overall

23671

Females

9502

F18-39

9502

10K→15K

6.2 - 9.3 mi

Top 81%
×3stories
+67ft-78ft

Overall

23080

Females

9140

F18-39

9140

15K→20K

9.3 - 12.4 mi

Top 78%
×5stories
+106ft-86ft

Overall

22252

Females

8726

F18-39

8726

20K→Half

12.4 - 13.1 mi

Top 80%
×2stories
+19ft-37ft

Overall

22672

Females

8976

F18-39

8976

Half→25K

13.1 - 15.5 mi

Top 77%
×4stories
+66ft-88ft

Overall

21961

Females

8631

F18-39

8631

25K→30K

15.5 - 18.6 mi

Top 79%
×9stories
+181ft-148ft

Overall

22440

Females

9019

F18-39

9019

30K→20M

18.6 - 20.0 mi

Top 80%
×5stories
+64ft-50ft

Overall

22818

Females

9324

F18-39

9324

20M→21M

20.0 - 21.0 mi

Top 82%
×8stories
+106ft-24ft

Overall

23255

Females

9633

F18-39

9633

21M→35K

21.0 - 21.8 mi

Top 81%
×7stories
+17ft-86ft

Overall

22917

Females

9511

F18-39

9511

35K→23M

21.8 - 23.0 mi

Top 83%
×5stories
+23ft-63ft

Overall

23555

Females

9876

F18-39

9876

23M→24M

23.0 - 24.0 mi

Top 80%
×6stories
+12ft-82ft

Overall

22733

Females

9502

F18-39

9502

24M→40K

24.0 - 24.9 mi

Top 75%
×1story
+6ft-20ft

Overall

21432

Females

8896

F18-39

8896

40K→25.2M

24.9 - 25.2 mi

Top 75%
×1story
+13ft-16ft

Overall

21318

Females

8828

F18-39

8828

25.2M→Finish

25.2 - 26.2 mi

Top 80%
×2stories
+22ft-21ft

Overall

22824

Females

9582

F18-39

9582

Passing Analysis

Category:
Athletes Passed
2392
Passed By
629
Net Change
+1763
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24631
5K → 10K53548+487#24631#24144
10K → 15K38726+361#24144#23783
15K → 20K40517+388#23783#23395
20K → Half6216+46#23395#23349
Half → 25K26123+238#23349#23111
25K → 30K25785+172#23111#22939
30K → 20M9565+30#22939#22909
20M → 21M5888-30#22909#22939
21M → 35K4448-4#22939#22943
35K → 23M6491-27#22943#22970
23M → 24M6140+21#22970#22949
24M → 40K8729+58#22949#22891
40K → 25.2M356+29#22891#22862
25.2M → Finish4147-6#22862#22868
TOTALS2392629+1763
📊

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