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BOSTON MARATHON 2025

Natalie Mlachak

Bib: 13626•F

AZ

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 40%
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
22:43
Rank: #10505
Start → 5K
22:43 | 7:19/mi
10K· 6.21 mi
45:18
Rank: #10271 (+234)
5K → 10K
22:35 | 7:16/mi
15K· 9.32 mi
1:07:55
Rank: #10107 (+164)
10K → 15K
22:37 | 7:17/mi
20K· 12.43 mi
1:32:04
Rank: #10839 (-732)
15K → 20K
24:09 | 7:46/mi
Half· 13.11 mi
1:37:23
Rank: #11022 (-183)
20K → Half
5:19 | 7:48/mi
25K· 15.53 mi
1:57:44
Rank: #11999 (-977)
Half → 25K
20:21 | 8:24/mi
30K· 18.64 mi
2:25:44
Rank: #13246 (-1247)
25K → 30K
28:00 | 9:01/mi
20M
2:38:06
Rank: #13559 (-313)
30K → 20M
12:22 | 9:06/mi
21M
2:49:26
Rank: #14412 (-853)
20M → 21M
11:20 | 11:20/mi
35K· 21.75 mi
2:56:30
Rank: #14686 (-274)
21M → 35K
7:04 | 9:27/mi
23M
3:08:30
Rank: #14990 (-304)
35K → 23M
12:00 | 9:35/mi
24M
3:17:27
Rank: #15077 (-87)
23M → 24M
8:57 | 8:57/mi
40K· 24.85 mi
3:25:05
Rank: #15122 (-45)
24M → 40K
7:38 | 8:56/mi
25.2M
3:28:18
Rank: #15076 (+46)
40K → 25.2M
3:13 | 9:20/mi
Finish· 26.22 mi
3:36:44
Rank: #15029 (+47)
25.2M → Finish
8:26 | 8:17/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:23
Pace7:26 /mi
2nd Half
Distance13.11 mi
Time1:59:21
Pace9:06 /mi
📊Positive Split: 22.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:4722:437:1922:43
7:19
-
10K
6.21 mi11:14:2245:187:1722:35
7:16
-0:03
15K
9.32 mi11:36:591:07:557:1722:37
7:17
+0:01
20K
12.43 mi12:01:081:32:047:2524:09
7:46
+0:29
Half
13.11 mi12:06:271:37:237:265:19
7:48
+0:02
25K
15.53 mi12:26:481:57:447:3520:21
8:24
+0:36
30K
18.64 mi12:54:482:25:447:4928:00
9:01
+0:37
20M
20.00 mi13:07:102:38:067:5412:22
9:06
+0:05
21M
21.00 mi13:18:302:49:268:0411:20
11:20
+2:14
35K
21.75 mi13:25:342:56:308:077:04
9:27
-1:53
23M
23.00 mi13:37:343:08:308:1212:00
9:35
+0:08
24M
24.00 mi13:46:313:17:278:148:57
8:57
-0:38
40K
24.85 mi13:54:093:25:058:157:38
8:56
-0:01
25.2M
25.20 mi13:57:223:28:188:163:13
9:20
+0:24
Finish
26.22 mi14:05:483:36:448:168:26
8:17
-1:03

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

7:16 /mi

Average Pace

8:16 /mi

Slowest Pace

11:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:06:10

58% of race

Time at Steady Pace

1:07:14

31% of race

Time at Slower Pace

23:20

11% of race

Average Pace: 8:16 /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 mi10:51:4722:437:1922:43
7:19
#10505
10K
6.21 mi11:14:2245:187:1722:35
7:16
#10271
15K
9.32 mi11:36:591:07:557:1722:37
7:17
#10107
20K
12.43 mi12:01:081:32:047:2524:09
7:46
#10839
Half
13.11 mi12:06:271:37:237:265:19
7:48
#11022
25K
15.53 mi12:26:481:57:447:3520:21
8:24
#11999
30K
18.64 mi12:54:482:25:447:4928:00
9:01
#13246
20M
20.00 mi13:07:102:38:067:5412:22
9:06
#13559
21M
21.00 mi13:18:302:49:268:0411:20
11:20
#14412
35K
21.75 mi13:25:342:56:308:077:04
9:27
#14686
23M
23.00 mi13:37:343:08:308:1212:00
9:35
#14990
24M
24.00 mi13:46:313:17:278:148:57
8:57
#15077
40K
24.85 mi13:54:093:25:058:157:38
8:56
#15122
25.2M
25.20 mi13:57:223:28:188:163:13
9:20
#15076
Finish
26.22 mi14:05:483:36:448:168:26
8:17
#15029
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi10505204220429851(Top 35%)1828(Top 15%)1828(Top 33%)
10K6.21 mi3.10 mi10271+2341943+991943+9910114(Top 36%)1882(Top 15%)1882(Top 34%)
15K9.32 mi3.11 mi10107+1641886+571886+579851(Top 35%)1828(Top 15%)1828(Top 33%)
20K12.43 mi3.11 mi10839-7322259-3732259-37313069(Top 46%)3592(Top 29%)3592(Top 66%)
Half13.11 mi0.68 mi11022-1832351-922351-9214294(Top 50%)4245(Top 35%)4245(Top 78%)
25K15.53 mi2.42 mi11999-9772921-5702921-57016532(Top 58%)5594(Top 46%)5594(Top 102%)
30K18.64 mi3.11 mi13246-12473690-7693690-76917761(Top 63%)6449(Top 53%)6449(Top 118%)
20M20.00 mi1.36 mi13559-3133884-1943884-19417314(Top 61%)6311(Top 52%)6311(Top 115%)
21M21.00 mi1.00 mi14412-8534389-5054389-50522230(Top 78%)9091(Top 74%)9091(Top 166%)
35K21.75 mi0.75 mi14686-2744559-1704559-17020147(Top 71%)8050(Top 66%)8050(Top 147%)
23M23.00 mi1.25 mi14990-3044762-2034762-20319030(Top 67%)7524(Top 62%)7524(Top 138%)
24M24.00 mi1.00 mi15077-874847-854847-8517119(Top 60%)6554(Top 54%)6554(Top 120%)
40K24.85 mi0.85 mi15122-454909-624909-6215910(Top 56%)5990(Top 49%)5990(Top 110%)
25.2M25.20 mi0.35 mi15076+464897+124897+1213671(Top 48%)4851(Top 40%)4851(Top 89%)
Finish26.22 mi1.02 mi15029+474890+74890+714787(Top 52%)5360(Top 44%)5360(Top 98%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21stories
+97ft-345ft

Overall

9851

Females

1828

F18-39

1828

5K→10K

3.1 - 6.2 mi

Top 36%
×5stories
+79ft-138ft

Overall

10114

Females

1882

F18-39

1882

10K→15K

6.2 - 9.3 mi

Top 35%
×3stories
+67ft-78ft

Overall

9851

Females

1828

F18-39

1828

15K→20K

9.3 - 12.4 mi

Top 46%
×5stories
+106ft-86ft

Overall

13069

Females

3592

F18-39

3592

20K→Half

12.4 - 13.1 mi

Top 50%
×2stories
+19ft-37ft

Overall

14294

Females

4245

F18-39

4245

Half→25K

13.1 - 15.5 mi

Top 58%
×4stories
+66ft-88ft

Overall

16532

Females

5594

F18-39

5594

25K→30K

15.5 - 18.6 mi

Top 63%
×9stories
+181ft-148ft

Overall

17761

Females

6449

F18-39

6449

30K→20M

18.6 - 20.0 mi

Top 61%
×5stories
+64ft-50ft

Overall

17314

Females

6311

F18-39

6311

20M→21M

20.0 - 21.0 mi

Top 78%
×8stories
+106ft-24ft

Overall

22230

Females

9091

F18-39

9091

21M→35K

21.0 - 21.8 mi

Top 71%
×7stories
+17ft-86ft

Overall

20147

Females

8050

F18-39

8050

35K→23M

21.8 - 23.0 mi

Top 67%
×5stories
+23ft-63ft

Overall

19030

Females

7524

F18-39

7524

23M→24M

23.0 - 24.0 mi

Top 60%
×6stories
+12ft-82ft

Overall

17119

Females

6554

F18-39

6554

24M→40K

24.0 - 24.9 mi

Top 56%
×1story
+6ft-20ft

Overall

15910

Females

5990

F18-39

5990

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

13671

Females

4851

F18-39

4851

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2stories
+22ft-21ft

Overall

14787

Females

5360

F18-39

5360

Passing Analysis

Category:
Athletes Passed
1161
Passed By
5684
Net Change
-4524
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10505
5K → 10K383149+234#10505#10271
10K → 15K25793+164#10271#10107
15K → 20K41772-732#10107#10839
20K → Half5188-183#10839#11022
Half → 25K341011-977#11022#11999
25K → 30K501297-1247#11999#13246
30K → 20M54367-313#13246#13559
20M → 21M8861-853#13559#14412
21M → 35K17291-274#14412#14686
35K → 23M49353-304#14686#14990
23M → 24M60147-87#14990#15077
24M → 40K4994-45#15077#15122
40K → 25.2M5711+46#15122#15076
25.2M → Finish9750+47#15076#15029
TOTALS11615684-4524
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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