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BOSTON MARATHON 2025

Liana Kobayashi

Bib: 19525•F

HI

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 48%
Gender (Female)
#0 / 12228
Top 33%
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
7:57/mi
24:42
↑ 97↓ 3451.5%
10K· 6.21 mi
7:49/mi
49:00
↑ 79↓ 1380.4%
15K· 9.32 mi
7:48/mi
1:13:13
↑ 67↓ 78
20K· 12.43 mi
7:55/mi
1:37:50
↑ 106↓ 860.1%
Half· 13.11 mi
7:52/mi
1:43:12
↑ 19↓ 370.5%
25K· 15.53 mi
8:02/mi
2:02:40
↑ 66↓ 880.2%
30K· 18.64 mi
8:15/mi
2:28:19
↑ 181↓ 1480.2%
20M
8:19/mi
2:39:37
↑ 64↓ 500.2%
21M
8:46/mi
2:48:23
↑ 106↓ 241.6%
35K· 21.75 mi
8:27/mi
2:54:42
↑ 17↓ 861.7%
23M
8:22/mi
3:05:11
↑ 23↓ 630.6%
24M
8:14/mi
3:13:25
↓ 821.3%
40K· 24.85 mi
8:24/mi
3:20:36
↓ 200.3%
25.2M
8:45/mi
3:23:37
↑ 13↓ 160.2%
Finish· 26.22 mi
7:37/mi
3:31:23
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:12
Pace7:52 /mi
2nd Half
Distance13.11 mi
Time1:48:11
Pace8:15 /mi
📊Positive Split: 4.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:3924:427:5724:42
7:57
-
10K
6.21 mi11:40:5749:007:5324:18
7:49
-0:08
15K
9.32 mi12:05:101:13:137:5124:13
7:48
-0:01
20K
12.43 mi12:29:471:37:507:5224:37
7:55
+0:07
Half
13.11 mi12:35:091:43:127:525:22
7:52
-0:03
25K
15.53 mi12:54:372:02:407:5419:28
8:02
+0:10
30K
18.64 mi13:20:162:28:197:5725:39
8:15
+0:13
20M
20.00 mi13:31:342:39:377:5911:18
8:19
+0:04
21M
21.00 mi13:40:202:48:238:018:46
8:46
+0:27
35K
21.75 mi13:46:392:54:428:026:19
8:27
-0:19
23M
23.00 mi13:57:083:05:118:0310:29
8:22
-0:05
24M
24.00 mi14:05:223:13:258:048:14
8:14
-0:08
40K
24.85 mi14:12:333:20:368:047:11
8:24
+0:10
25.2M
25.20 mi14:15:343:23:378:053:01
8:45
+0:21
Finish
26.22 mi14:23:203:31:238:047:46
7:37
-1:08

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

7:37 /mi

Average Pace

8:04 /mi

Slowest Pace

8:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:06:06

88% of race

Time at Steady Pace

25:17

12% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:04 /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 mi11:16:3924:427:5724:42
7:57
#16198
10K
6.21 mi11:40:5749:007:5324:18
7:49
#15541
15K
9.32 mi12:05:101:13:137:5124:13
7:48
#15130
20K
12.43 mi12:29:471:37:507:5224:37
7:55
#14857
Half
13.11 mi12:35:091:43:127:525:22
7:52
#14849
25K
15.53 mi12:54:372:02:407:5419:28
8:02
#14696
30K
18.64 mi13:20:162:28:197:5725:39
8:15
#14341
20M
20.00 mi13:31:342:39:377:5911:18
8:19
#14160
21M
21.00 mi13:40:202:48:238:018:46
8:46
#13988
35K
21.75 mi13:46:392:54:428:026:19
8:27
#14044
23M
23.00 mi13:57:083:05:118:0310:29
8:22
#13943
24M
24.00 mi14:05:223:13:258:048:14
8:14
#13876
40K
24.85 mi14:12:333:20:368:047:11
8:24
#13813
25.2M
25.20 mi14:15:343:23:378:053:01
8:45
#13733
Finish
26.22 mi14:23:203:31:238:047:46
7:37
#13592
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi161985261526114341(Top 50%)4229(Top 35%)4229(Top 77%)
10K6.21 mi3.10 mi15541+6574863+3984863+39815020(Top 53%)4549(Top 37%)4549(Top 83%)
15K9.32 mi3.11 mi15130+4114636+2274636+22714341(Top 50%)4229(Top 35%)4229(Top 77%)
20K12.43 mi3.11 mi14857+2734506+1304506+13014315(Top 50%)4258(Top 35%)4258(Top 78%)
Half13.11 mi0.68 mi14849+84504+24504+214838(Top 52%)4516(Top 37%)4516(Top 83%)
25K15.53 mi2.42 mi14696+1534444+604444+6014135(Top 50%)4269(Top 35%)4269(Top 78%)
30K18.64 mi3.11 mi14341+3554303+1414303+14113211(Top 47%)3949(Top 32%)3949(Top 72%)
20M20.00 mi1.36 mi14160+1814222+814222+8112621(Top 44%)3768(Top 31%)3768(Top 69%)
21M21.00 mi1.00 mi13988+1724156+664156+6612121(Top 43%)3666(Top 30%)3666(Top 67%)
35K21.75 mi0.75 mi14044-564210-544210-5415139(Top 53%)5301(Top 43%)5301(Top 97%)
23M23.00 mi1.25 mi13943+1014193+174193+1712519(Top 44%)4004(Top 33%)4004(Top 73%)
24M24.00 mi1.00 mi13876+674187+64187+612832(Top 45%)4232(Top 35%)4232(Top 77%)
40K24.85 mi0.85 mi13813+634190-34190-312826(Top 45%)4346(Top 36%)4346(Top 79%)
25.2M25.20 mi0.35 mi13733+804155+354155+3510407(Top 37%)3243(Top 27%)3243(Top 59%)
Finish26.22 mi1.02 mi13592+1414093+624093+6210158(Top 36%)3078(Top 25%)3078(Top 56%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21story building
+97ft-345ft

Overall

14341

Females

4229

F18-39

4229

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

15020

Females

4549

F18-39

4549

10K→15K

6.2 - 9.3 mi

Top 50%
×3story building
+67ft-78ft

Overall

14341

Females

4229

F18-39

4229

15K→20K

9.3 - 12.4 mi

Top 50%
×5story building
+106ft-86ft

Overall

14315

Females

4258

F18-39

4258

20K→Half

12.4 - 13.1 mi

Top 52%
×2story building
+19ft-37ft

Overall

14838

Females

4516

F18-39

4516

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

14135

Females

4269

F18-39

4269

25K→30K

15.5 - 18.6 mi

Top 47%
×9story building
+181ft-148ft

Overall

13211

Females

3949

F18-39

3949

30K→20M

18.6 - 20.0 mi

Top 44%
×5story building
+64ft-50ft

Overall

12621

Females

3768

F18-39

3768

20M→21M

20.0 - 21.0 mi

Top 43%
×8story building
+106ft-24ft

Overall

12121

Females

3666

F18-39

3666

21M→35K

21.0 - 21.8 mi

Top 53%
×7story building
+17ft-86ft

Overall

15139

Females

5301

F18-39

5301

35K→23M

21.8 - 23.0 mi

Top 44%
×5story building
+23ft-63ft

Overall

12519

Females

4004

F18-39

4004

23M→24M

23.0 - 24.0 mi

Top 45%
×6story building
+12ft-82ft

Overall

12832

Females

4232

F18-39

4232

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

12826

Females

4346

F18-39

4346

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

10407

Females

3243

F18-39

3243

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2story building
+22ft-21ft

Overall

10158

Females

3078

F18-39

3078

Passing Analysis

Category:
Athletes Passed
3360
Passed By
754
Net Change
+2606
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16198
5K → 10K75194+657#16198#15541
10K → 15K45443+411#15541#15130
15K → 20K34168+273#15130#14857
20K → Half4133+8#14857#14849
Half → 25K24390+153#14849#14696
25K → 30K43479+355#14696#14341
30K → 20M21130+181#14341#14160
20M → 21M20028+172#14160#13988
21M → 35K53109-56#13988#14044
35K → 23M16160+101#14044#13943
23M → 24M11952+67#13943#13876
24M → 40K11754+63#13876#13813
40K → 25.2M811+80#13813#13733
25.2M → Finish15413+141#13733#13592
TOTALS3360754+2606
📊

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