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BOSTON MARATHON 2025

Lyndie Sundby

Bib: 18335•F

BC

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 46%
Gender (Female)
#0 / 12228
Top 31%
Division (F18-39)
#0 / 5469
Top 50%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:45
Rank: #16332
Start → 5K
7:58/mi
24:45 split
10K· 6.21 mi
49:20
Rank: #16011 (+321)
5K → 10K
7:55/mi
24:35 split
15K· 9.32 mi
1:13:34
Rank: #15437 (+574)
10K → 15K
7:48/mi
24:14 split
20K· 12.43 mi
1:37:56
Rank: #14926 (+511)
15K → 20K
7:51/mi
24:22 split
Half· 13.11 mi
1:43:14
Rank: #14877 (+49)
20K → Half
7:46/mi
5:18 split
25K· 15.53 mi
2:02:09
Rank: #14416 (+461)
Half → 25K
7:48/mi
18:55 split
30K· 18.64 mi
2:27:11
Rank: #13851 (+565)
25K → 30K
8:03/mi
25:02 split
20M
2:38:18
Rank: #13637 (+214)
30K → 20M
8:11/mi
11:07 split
21M
2:46:54
Rank: #13473 (+164)
20M → 21M
8:36/mi
8:36 split
35K· 21.75 mi
2:52:44
Rank: #13356 (+117)
21M → 35K
7:48/mi
5:50 split
23M
3:03:00
Rank: #13203 (+153)
35K → 23M
8:12/mi
10:16 split
24M
3:11:04
Rank: #13120 (+83)
23M → 24M
8:04/mi
8:04 split
40K· 24.85 mi
3:18:07
Rank: #13054 (+66)
24M → 40K
8:15/mi
7:03 split
25.2M
3:21:14
Rank: #13037 (+17)
40K → 25.2M
9:02/mi
3:07 split
Finish· 26.22 mi
3:29:30
Rank: #13077 (-40)
25.2M → Finish
8:07/mi
8:16 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:14
Pace7:52 /mi
2nd Half
Distance13.11 mi
Time1:46:16
Pace8:06 /mi
📊Positive Split: 2.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:3424:457:5824:45
7:58
-
10K
6.21 mi11:44:0949:207:5624:35
7:55
-0:03
15K
9.32 mi12:08:231:13:347:5424:14
7:48
-0:07
20K
12.43 mi12:32:451:37:567:5324:22
7:51
+0:03
Half
13.11 mi12:38:031:43:147:525:18
7:46
-0:05
25K
15.53 mi12:56:582:02:097:5218:55
7:48
+0:02
30K
18.64 mi13:22:002:27:117:5425:02
8:03
+0:15
20M
20.00 mi13:33:072:38:187:5511:07
8:11
+0:08
21M
21.00 mi13:41:432:46:547:578:36
8:36
+0:25
35K
21.75 mi13:47:332:52:447:575:50
7:48
-0:48
23M
23.00 mi13:57:493:03:007:5710:16
8:12
+0:24
24M
24.00 mi14:05:533:11:047:588:04
8:04
-0:08
40K
24.85 mi14:12:563:18:077:587:03
8:15
+0:11
25.2M
25.20 mi14:16:033:21:147:593:07
9:02
+0:47
Finish
26.22 mi14:24:193:29:308:008:16
8:07
-0:55

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

7:46 /mi

Average Pace

8:00 /mi

Slowest Pace

9:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:17:47

94% of race

Time at Steady Pace

11:43

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:59 /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 mi11:19:3424:457:5824:45
7:58
#16332
10K
6.21 mi11:44:0949:207:5624:35
7:55
#16011
15K
9.32 mi12:08:231:13:347:5424:14
7:48
#15437
20K
12.43 mi12:32:451:37:567:5324:22
7:51
#14926
Half
13.11 mi12:38:031:43:147:525:18
7:46
#14877
25K
15.53 mi12:56:582:02:097:5218:55
7:48
#14416
30K
18.64 mi13:22:002:27:117:5425:02
8:03
#13851
20M
20.00 mi13:33:072:38:187:5511:07
8:11
#13637
21M
21.00 mi13:41:432:46:547:578:36
8:36
#13473
35K
21.75 mi13:47:332:52:447:575:50
7:48
#13356
23M
23.00 mi13:57:493:03:007:5710:16
8:12
#13203
24M
24.00 mi14:05:533:11:047:588:04
8:04
#13120
40K
24.85 mi14:12:563:18:077:587:03
8:15
#13054
25.2M
25.20 mi14:16:033:21:147:593:07
9:02
#13037
Finish
26.22 mi14:24:193:29:308:008:16
8:07
#13077
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi163325345534514384(Top 51%)4249(Top 35%)4249(Top 78%)
10K6.21 mi3.10 mi16011+3215140+2055140+20515748(Top 55%)4977(Top 41%)4977(Top 91%)
15K9.32 mi3.11 mi15437+5744808+3324808+33214384(Top 51%)4249(Top 35%)4249(Top 78%)
20K12.43 mi3.11 mi14926+5114542+2664542+26613630(Top 48%)3892(Top 32%)3892(Top 71%)
Half13.11 mi0.68 mi14877+494524+184524+1814038(Top 49%)4071(Top 33%)4071(Top 74%)
25K15.53 mi2.42 mi14416+4614284+2404284+24012403(Top 44%)3343(Top 27%)3343(Top 61%)
30K18.64 mi3.11 mi13851+5654024+2604024+26011815(Top 42%)3205(Top 26%)3205(Top 59%)
20M20.00 mi1.36 mi13637+2143927+973927+9711712(Top 41%)3310(Top 27%)3310(Top 61%)
21M21.00 mi1.00 mi13473+1643877+503877+5011127(Top 39%)3167(Top 26%)3167(Top 58%)
35K21.75 mi0.75 mi13356+1173831+463831+4610881(Top 38%)3064(Top 25%)3064(Top 56%)
23M23.00 mi1.25 mi13203+1533787+443787+4411382(Top 40%)3428(Top 28%)3428(Top 63%)
24M24.00 mi1.00 mi13120+833774+133774+1311716(Top 41%)3669(Top 30%)3669(Top 67%)
40K24.85 mi0.85 mi13054+663761+133761+1311861(Top 42%)3848(Top 31%)3848(Top 70%)
25.2M25.20 mi0.35 mi13037+173759+23759+212065(Top 42%)4006(Top 33%)4006(Top 73%)
Finish26.22 mi1.02 mi13077-403804-453804-4513689(Top 48%)4787(Top 39%)4787(Top 88%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21stories
+97ft-345ft

Overall

14384

Females

4249

F18-39

4249

5K→10K

3.1 - 6.2 mi

Top 55%
×5stories
+79ft-138ft

Overall

15748

Females

4977

F18-39

4977

10K→15K

6.2 - 9.3 mi

Top 51%
×3stories
+67ft-78ft

Overall

14384

Females

4249

F18-39

4249

15K→20K

9.3 - 12.4 mi

Top 48%
×5stories
+106ft-86ft

Overall

13630

Females

3892

F18-39

3892

20K→Half

12.4 - 13.1 mi

Top 49%
×2stories
+19ft-37ft

Overall

14038

Females

4071

F18-39

4071

Half→25K

13.1 - 15.5 mi

Top 44%
×4stories
+66ft-88ft

Overall

12403

Females

3343

F18-39

3343

25K→30K

15.5 - 18.6 mi

Top 42%
×9stories
+181ft-148ft

Overall

11815

Females

3205

F18-39

3205

30K→20M

18.6 - 20.0 mi

Top 41%
×5stories
+64ft-50ft

Overall

11712

Females

3310

F18-39

3310

20M→21M

20.0 - 21.0 mi

Top 39%
×8stories
+106ft-24ft

Overall

11127

Females

3167

F18-39

3167

21M→35K

21.0 - 21.8 mi

Top 38%
×7stories
+17ft-86ft

Overall

10881

Females

3064

F18-39

3064

35K→23M

21.8 - 23.0 mi

Top 40%
×5stories
+23ft-63ft

Overall

11382

Females

3428

F18-39

3428

23M→24M

23.0 - 24.0 mi

Top 41%
×6stories
+12ft-82ft

Overall

11716

Females

3669

F18-39

3669

24M→40K

24.0 - 24.9 mi

Top 42%
×1story
+6ft-20ft

Overall

11861

Females

3848

F18-39

3848

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1story
+13ft-16ft

Overall

12065

Females

4006

F18-39

4006

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2stories
+22ft-21ft

Overall

13689

Females

4787

F18-39

4787

Passing Analysis

Category:
Athletes Passed
3788
Passed By
533
Net Change
+3255
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16332
5K → 10K496175+321#16332#16011
10K → 15K60026+574#16011#15437
15K → 20K52817+511#15437#14926
20K → Half6415+49#14926#14877
Half → 25K4665+461#14877#14416
25K → 30K59126+565#14416#13851
30K → 20M23622+214#13851#13637
20M → 21M19329+164#13637#13473
21M → 35K13215+117#13473#13356
35K → 23M17926+153#13356#13203
23M → 24M11532+83#13203#13120
24M → 40K10539+66#13120#13054
40K → 25.2M3619+17#13054#13037
25.2M → Finish4787-40#13037#13077
TOTALS3788533+3255
📊

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