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BOSTON MARATHON 2025

Julia Guk

Bib: 17710•F

NS

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

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
12:06/mi
37:37
↑ 97↓ 3451.5%
10K· 6.21 mi
13:22/mi
1:19:09
↑ 79↓ 1380.4%
15K· 9.32 mi
12:22/mi
1:57:33
↑ 67↓ 78
20K· 12.43 mi
12:18/mi
2:35:46
↑ 106↓ 860.1%
Half· 13.11 mi
9:40/mi
2:42:22
↑ 19↓ 370.5%
25K· 15.53 mi
12:35/mi
3:12:53
↑ 66↓ 880.2%
30K· 18.64 mi
10:38/mi
3:45:56
↑ 181↓ 1480.2%
20M
12:25/mi
4:02:49
↑ 64↓ 500.2%
21M
13:20/mi
4:16:09
↑ 106↓ 241.6%
35K· 21.75 mi
8:09/mi
4:22:15
↑ 17↓ 861.7%
23M
11:41/mi
4:36:53
↑ 23↓ 630.6%
24M
9:06/mi
4:45:59
↓ 821.3%
40K· 24.85 mi
11:30/mi
4:55:49
↓ 200.3%
25.2M
8:33/mi
4:58:46
↑ 13↓ 160.2%
Finish· 26.22 mi
7:28/mi
5:06:23
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time2:42:22
Pace12:23 /mi
2nd Half✓ Faster
Distance13.11 mi
Time2:24:01
Pace10:59 /mi
📊Negative Split: 11.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:28:0437:3712:0637:37
12:06
-
10K
6.21 mi12:09:361:19:0912:4441:32
13:22
+1:16
15K
9.32 mi12:48:001:57:3312:3738:24
12:22
-1:00
20K
12.43 mi13:26:132:35:4612:3238:13
12:18
-0:04
Half
13.11 mi13:32:492:42:2212:236:36
9:40
-2:38
25K
15.53 mi14:03:203:12:5312:2530:31
12:35
+2:55
30K
18.64 mi14:36:233:45:5612:0733:03
10:38
-1:57
20M
20.00 mi14:53:164:02:4912:0816:53
12:25
+1:47
21M
21.00 mi15:06:364:16:0912:1213:20
13:20
+0:55
35K
21.75 mi15:12:424:22:1512:046:06
8:09
-5:11
23M
23.00 mi15:27:204:36:5312:0214:38
11:41
+3:32
24M
24.00 mi15:36:264:45:5911:559:06
9:06
-2:35
40K
24.85 mi15:46:164:55:4911:549:50
11:30
+2:24
25.2M
25.20 mi15:49:134:58:4611:512:57
8:33
-2:57
Finish
26.22 mi15:56:505:06:2311:427:37
7:28
-1:05

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

7:28 /mi

Average Pace

11:42 /mi

Slowest Pace

13:22 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:05:25

21% of race

Time at Steady Pace

3:06:06

61% of race

Time at Slower Pace

54:52

18% of race

Average Pace: 11:41 /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 mi11:28:0437:3712:0637:37
12:06
#28258
10K
6.21 mi12:09:361:19:0912:4441:32
13:22
#28340
15K
9.32 mi12:48:001:57:3312:3738:24
12:22
#28263
20K
12.43 mi13:26:132:35:4612:3238:13
12:18
#28124
Half
13.11 mi13:32:492:42:2212:236:36
9:40
#28028
25K
15.53 mi14:03:203:12:5312:2530:31
12:35
#27901
30K
18.64 mi14:36:233:45:5612:0733:03
10:38
#27414
20M
20.00 mi14:53:164:02:4912:0816:53
12:25
#27316
21M
21.00 mi15:06:364:16:0912:1213:20
13:20
#27254
35K
21.75 mi15:12:424:22:1512:046:06
8:09
#27086
23M
23.00 mi15:27:204:36:5312:0214:38
11:41
#27015
24M
24.00 mi15:36:264:45:5911:559:06
9:06
#26831
40K
24.85 mi15:46:164:55:4911:549:50
11:30
#26760
25.2M
25.20 mi15:49:134:58:4611:512:57
8:33
#26668
Finish
26.22 mi15:56:505:06:2311:427:37
7:28
#26464
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi28258121311213127853(Top 98%)11888(Top 97%)11888(Top 217%)
10K6.21 mi3.10 mi28340-8212187-5612187-5628356(Top 100%)12202(Top 100%)12202(Top 223%)
15K9.32 mi3.11 mi28263+7712143+4412143+4427853(Top 98%)11888(Top 97%)11888(Top 217%)
20K12.43 mi3.11 mi28124+13912051+9212051+9227351(Top 96%)11609(Top 95%)11609(Top 212%)
Half13.11 mi0.68 mi28028+9611996+5511996+5524007(Top 85%)9718(Top 79%)9718(Top 178%)
25K15.53 mi2.42 mi27901+12711919+7711919+7726985(Top 95%)11416(Top 93%)11416(Top 209%)
30K18.64 mi3.11 mi27414+48711650+26911650+26923242(Top 82%)9461(Top 77%)9461(Top 173%)
20M20.00 mi1.36 mi27316+9811595+5511595+5525816(Top 91%)10913(Top 89%)10913(Top 200%)
21M21.00 mi1.00 mi27254+6211563+3211563+3225481(Top 90%)10802(Top 88%)10802(Top 198%)
35K21.75 mi0.75 mi27086+16811468+9511468+9513221(Top 47%)4304(Top 35%)4304(Top 79%)
23M23.00 mi1.25 mi27015+7111436+3211436+3224572(Top 87%)10381(Top 85%)10381(Top 190%)
24M24.00 mi1.00 mi26831+18411342+9411342+9417835(Top 63%)6955(Top 57%)6955(Top 127%)
40K24.85 mi0.85 mi26760+7111309+3311309+3324124(Top 85%)10235(Top 84%)10235(Top 187%)
25.2M25.20 mi0.35 mi26668+9211261+4811261+488966(Top 32%)2550(Top 21%)2550(Top 47%)
Finish26.22 mi1.02 mi26464+20411146+11511146+1158958(Top 32%)2531(Top 21%)2531(Top 46%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 98%
×21story building
+97ft-345ft

Overall

27853

Females

11888

F18-39

11888

5K→10K

3.1 - 6.2 mi

Top 100%
×5story building
+79ft-138ft

Overall

28356

Females

12202

F18-39

12202

10K→15K

6.2 - 9.3 mi

Top 98%
×3story building
+67ft-78ft

Overall

27853

Females

11888

F18-39

11888

15K→20K

9.3 - 12.4 mi

Top 96%
×5story building
+106ft-86ft

Overall

27351

Females

11609

F18-39

11609

20K→Half

12.4 - 13.1 mi

Top 85%
×2story building
+19ft-37ft

Overall

24007

Females

9718

F18-39

9718

Half→25K

13.1 - 15.5 mi

Top 95%
×4story building
+66ft-88ft

Overall

26985

Females

11416

F18-39

11416

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

23242

Females

9461

F18-39

9461

30K→20M

18.6 - 20.0 mi

Top 91%
×5story building
+64ft-50ft

Overall

25816

Females

10913

F18-39

10913

20M→21M

20.0 - 21.0 mi

Top 90%
×8story building
+106ft-24ft

Overall

25481

Females

10802

F18-39

10802

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

13221

Females

4304

F18-39

4304

35K→23M

21.8 - 23.0 mi

Top 87%
×5story building
+23ft-63ft

Overall

24572

Females

10381

F18-39

10381

23M→24M

23.0 - 24.0 mi

Top 63%
×6story building
+12ft-82ft

Overall

17835

Females

6955

F18-39

6955

24M→40K

24.0 - 24.9 mi

Top 85%
×1story
+6ft-20ft

Overall

24124

Females

10235

F18-39

10235

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

8966

Females

2550

F18-39

2550

25.2M→Finish

25.2 - 26.2 mi

Top 32%
×2story building
+22ft-21ft

Overall

8958

Females

2531

F18-39

2531

Passing Analysis

Category:
Athletes Passed
1894
Passed By
100
Net Change
+1794
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#28258
5K → 10K890-82#28258#28340
10K → 15K781+77#28340#28263
15K → 20K1401+139#28263#28124
20K → Half960+96#28124#28028
Half → 25K1336+127#28028#27901
25K → 30K4870+487#27901#27414
30K → 20M980+98#27414#27316
20M → 21M631+62#27316#27254
21M → 35K1680+168#27254#27086
35K → 23M721+71#27086#27015
23M → 24M1840+184#27015#26831
24M → 40K710+71#26831#26760
40K → 25.2M920+92#26760#26668
25.2M → Finish2040+204#26668#26464
TOTALS1894100+1794
📊

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