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BOSTON MARATHON 2025

Kristen Sydlowski

Bib: 27960•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
31:25
Rank: #25856
Start → 5K
10:07/mi
31:25 split
10K· 6.21 mi
1:03:07
Rank: #25817 (+39)
5K → 10K
10:12/mi
31:42 split
15K· 9.32 mi
1:36:04
Rank: #25934 (-117)
10K → 15K
10:36/mi
32:57 split
20K· 12.43 mi
2:08:23
Rank: #25661 (+273)
15K → 20K
10:24/mi
32:19 split
Half· 13.11 mi
2:15:16
Rank: #25639 (+22)
20K → Half
10:05/mi
6:53 split
25K· 15.53 mi
2:40:25
Rank: #25376 (+263)
Half → 25K
10:22/mi
25:09 split
30K· 18.64 mi
3:13:59
Rank: #25056 (+320)
25K → 30K
10:48/mi
33:34 split
20M
3:28:47
Rank: #24956 (+100)
30K → 20M
10:53/mi
14:48 split
21M
3:39:53
Rank: #24800 (+156)
20M → 21M
11:06/mi
11:06 split
35K· 21.75 mi
3:48:04
Rank: #24785 (+15)
21M → 35K
10:56/mi
8:11 split
23M
4:01:12
Rank: #24671 (+114)
35K → 23M
10:29/mi
13:08 split
24M
4:11:20
Rank: #24572 (+99)
23M → 24M
10:08/mi
10:08 split
40K· 24.85 mi
4:20:09
Rank: #24478 (+94)
24M → 40K
10:19/mi
8:49 split
25.2M
4:24:02
Rank: #24442 (+36)
40K → 25.2M
11:16/mi
3:53 split
Finish· 26.22 mi
4:33:59
Rank: #24371 (+71)
25.2M → Finish
9:46/mi
9:57 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:15:16
Pace10:19 /mi
2nd Half
Distance13.11 mi
Time2:18:43
Pace10:35 /mi
📊Positive Split: 2.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:57:1931:2510:0731:25
10:07
-
10K
6.21 mi12:29:011:03:0710:0931:42
10:12
+0:05
15K
9.32 mi13:01:581:36:0410:1832:57
10:36
+0:24
20K
12.43 mi13:34:172:08:2310:2032:19
10:24
-0:12
Half
13.11 mi13:41:102:15:1610:196:53
10:05
-0:19
25K
15.53 mi14:06:192:40:2510:2025:09
10:22
+0:17
30K
18.64 mi14:39:533:13:5910:2433:34
10:48
+0:26
20M
20.00 mi14:54:413:28:4710:2614:48
10:53
+0:05
21M
21.00 mi15:05:473:39:5310:2811:06
11:06
+0:13
35K
21.75 mi15:13:583:48:0410:298:11
10:56
-0:10
23M
23.00 mi15:27:064:01:1210:2913:08
10:29
-0:27
24M
24.00 mi15:37:144:11:2010:2810:08
10:08
-0:21
40K
24.85 mi15:46:034:20:0910:288:49
10:19
+0:11
25.2M
25.20 mi15:49:564:24:0210:293:53
11:16
+0:57
Finish
26.22 mi15:59:534:33:5910:279:57
9:46
-1:30

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

9:46 /mi

Average Pace

10:27 /mi

Slowest Pace

11:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:22:27

74% of race

Time at Steady Pace

1:11:32

26% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 10:27 /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 mi11:57:1931:2510:0731:25
10:07
#25856
10K
6.21 mi12:29:011:03:0710:0931:42
10:12
#25817
15K
9.32 mi13:01:581:36:0410:1832:57
10:36
#25934
20K
12.43 mi13:34:172:08:2310:2032:19
10:24
#25661
Half
13.11 mi13:41:102:15:1610:196:53
10:05
#25639
25K
15.53 mi14:06:192:40:2510:2025:09
10:22
#25376
30K
18.64 mi14:39:533:13:5910:2433:34
10:48
#25056
20M
20.00 mi14:54:413:28:4710:2614:48
10:53
#24956
21M
21.00 mi15:05:473:39:5310:2811:06
11:06
#24800
35K
21.75 mi15:13:583:48:0410:298:11
10:56
#24785
23M
23.00 mi15:27:064:01:1210:2913:08
10:29
#24671
24M
24.00 mi15:37:144:11:2010:2810:08
10:08
#24572
40K
24.85 mi15:46:034:20:0910:288:49
10:19
#24478
25.2M
25.20 mi15:49:564:24:0210:293:53
11:16
#24442
Finish
26.22 mi15:59:534:33:5910:279:57
9:46
#24371
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi25856106781067826120(Top 92%)10855(Top 89%)10855(Top 198%)
10K6.21 mi3.10 mi25817+3910670+810670+825752(Top 91%)10658(Top 87%)10658(Top 195%)
15K9.32 mi3.11 mi25934-11710740-7010740-7026120(Top 92%)10855(Top 89%)10855(Top 198%)
20K12.43 mi3.11 mi25661+27310596+14410596+14425030(Top 88%)10274(Top 84%)10274(Top 188%)
Half13.11 mi0.68 mi25639+2210582+1410582+1425023(Top 88%)10270(Top 84%)10270(Top 188%)
25K15.53 mi2.42 mi25376+26310459+12310459+12324126(Top 85%)9812(Top 80%)9812(Top 179%)
30K18.64 mi3.11 mi25056+32010307+15210307+15223628(Top 83%)9665(Top 79%)9665(Top 177%)
20M20.00 mi1.36 mi24956+10010270+3710270+3723389(Top 82%)9624(Top 79%)9624(Top 176%)
21M21.00 mi1.00 mi24800+15610190+8010190+8021680(Top 76%)8809(Top 72%)8809(Top 161%)
35K21.75 mi0.75 mi24785+1510195-510195-524091(Top 85%)10113(Top 83%)10113(Top 185%)
23M23.00 mi1.25 mi24671+11410155+4010155+4022010(Top 77%)9080(Top 74%)9080(Top 166%)
24M24.00 mi1.00 mi24572+9910113+4210113+4221779(Top 77%)9028(Top 74%)9028(Top 165%)
40K24.85 mi0.85 mi24478+9410070+4310070+4321441(Top 75%)8905(Top 73%)8905(Top 163%)
25.2M25.20 mi0.35 mi24442+3610049+2110049+2121480(Top 76%)8913(Top 73%)8913(Top 163%)
Finish26.22 mi1.02 mi24371+7110032+1710032+1722166(Top 78%)9253(Top 76%)9253(Top 169%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 92%
×21story building
+97ft-345ft

Overall

26120

Females

10855

F18-39

10855

5K→10K

3.1 - 6.2 mi

Top 91%
×5story building
+79ft-138ft

Overall

25752

Females

10658

F18-39

10658

10K→15K

6.2 - 9.3 mi

Top 92%
×3story building
+67ft-78ft

Overall

26120

Females

10855

F18-39

10855

15K→20K

9.3 - 12.4 mi

Top 88%
×5story building
+106ft-86ft

Overall

25030

Females

10274

F18-39

10274

20K→Half

12.4 - 13.1 mi

Top 88%
×2story building
+19ft-37ft

Overall

25023

Females

10270

F18-39

10270

Half→25K

13.1 - 15.5 mi

Top 85%
×4story building
+66ft-88ft

Overall

24126

Females

9812

F18-39

9812

25K→30K

15.5 - 18.6 mi

Top 83%
×9story building
+181ft-148ft

Overall

23628

Females

9665

F18-39

9665

30K→20M

18.6 - 20.0 mi

Top 82%
×5story building
+64ft-50ft

Overall

23389

Females

9624

F18-39

9624

20M→21M

20.0 - 21.0 mi

Top 76%
×8story building
+106ft-24ft

Overall

21680

Females

8809

F18-39

8809

21M→35K

21.0 - 21.8 mi

Top 85%
×7story building
+17ft-86ft

Overall

24091

Females

10113

F18-39

10113

35K→23M

21.8 - 23.0 mi

Top 77%
×5story building
+23ft-63ft

Overall

22010

Females

9080

F18-39

9080

23M→24M

23.0 - 24.0 mi

Top 77%
×6story building
+12ft-82ft

Overall

21779

Females

9028

F18-39

9028

24M→40K

24.0 - 24.9 mi

Top 75%
×1story
+6ft-20ft

Overall

21441

Females

8905

F18-39

8905

40K→25.2M

24.9 - 25.2 mi

Top 76%
×1story
+13ft-16ft

Overall

21480

Females

8913

F18-39

8913

25.2M→Finish

25.2 - 26.2 mi

Top 78%
×2story building
+22ft-21ft

Overall

22166

Females

9253

F18-39

9253

Passing Analysis

Category:
Athletes Passed
1964
Passed By
479
Net Change
+1485
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25856
5K → 10K216177+39#25856#25817
10K → 15K84201-117#25817#25934
15K → 20K28512+273#25934#25661
20K → Half3210+22#25661#25639
Half → 25K2718+263#25639#25376
25K → 30K3299+320#25376#25056
30K → 20M11111+100#25056#24956
20M → 21M1593+156#24956#24800
21M → 35K4227+15#24800#24785
35K → 23M1228+114#24785#24671
23M → 24M1001+99#24671#24572
24M → 40K962+94#24572#24478
40K → 25.2M382+36#24478#24442
25.2M → Finish798+71#24442#24371
TOTALS1964479+1485
📊

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