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BOSTON MARATHON 2025

Chiara Baio

Bib: 13579•F

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
7:06/mi
22:02
↑ 97↓ 3451.5%
10K· 6.21 mi
7:14/mi
44:30
↑ 79↓ 1380.4%
15K· 9.32 mi
7:22/mi
1:07:23
↑ 67↓ 78
20K· 12.43 mi
7:38/mi
1:31:06
↑ 106↓ 860.1%
Half· 13.11 mi
7:45/mi
1:36:23
↑ 19↓ 370.5%
25K· 15.53 mi
8:19/mi
1:56:34
↑ 66↓ 880.2%
30K· 18.64 mi
9:30/mi
2:26:04
↑ 181↓ 1480.2%
20M
11:24/mi
2:41:34
↑ 64↓ 500.2%
21M
10:42/mi
2:52:16
↑ 106↓ 241.6%
35K· 21.75 mi
12:11/mi
3:01:23
↑ 17↓ 861.7%
23M
12:23/mi
3:16:53
↑ 23↓ 630.6%
24M
10:08/mi
3:27:01
↓ 821.3%
40K· 24.85 mi
10:26/mi
3:35:56
↓ 200.3%
25.2M
11:42/mi
3:39:58
↑ 13↓ 160.2%
Finish· 26.22 mi
10:18/mi
3:50:28
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:23
Pace7:21 /mi
2nd Half
Distance13.11 mi
Time2:14:05
Pace10:14 /mi
📊Positive Split: 39.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:0522:027:0622:02
7:06
-
10K
6.21 mi11:13:3344:307:1022:28
7:14
+0:08
15K
9.32 mi11:36:261:07:237:1422:53
7:22
+0:08
20K
12.43 mi12:00:091:31:067:2023:43
7:38
+0:16
Half
13.11 mi12:05:261:36:237:215:17
7:45
+0:07
25K
15.53 mi12:25:371:56:347:3020:11
8:19
+0:34
30K
18.64 mi12:55:072:26:047:5029:30
9:30
+1:11
20M
20.00 mi13:10:372:41:348:0515:30
11:24
+1:54
21M
21.00 mi13:21:192:52:168:1210:42
10:42
-0:42
35K
21.75 mi13:30:263:01:238:209:07
12:11
+1:29
23M
23.00 mi13:45:563:16:538:3415:30
12:23
+0:12
24M
24.00 mi13:56:043:27:018:3810:08
10:08
-2:15
40K
24.85 mi14:04:593:35:568:418:55
10:26
+0:18
25.2M
25.20 mi14:09:013:39:588:444:02
11:42
+1:16
Finish
26.22 mi14:19:313:50:288:4810:30
10:18
-1:24

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

7:06 /mi

Average Pace

8:48 /mi

Slowest Pace

12:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:56:34

51% of race

Time at Steady Pace

1:09:45

30% of race

Time at Slower Pace

44:09

19% of race

Average Pace: 8:47 /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 mi10:51:0522:027:0622:02
7:06
#8586
10K
6.21 mi11:13:3344:307:1022:28
7:14
#9141
15K
9.32 mi11:36:261:07:237:1422:53
7:22
#9591
20K
12.43 mi12:00:091:31:067:2023:43
7:38
#10142
Half
13.11 mi12:05:261:36:237:215:17
7:45
#10326
25K
15.53 mi12:25:371:56:347:3020:11
8:19
#11367
30K
18.64 mi12:55:072:26:047:5029:30
9:30
#13387
20M
20.00 mi13:10:372:41:348:0515:30
11:24
#14973
21M
21.00 mi13:21:192:52:168:1210:42
10:42
#15424
35K
21.75 mi13:30:263:01:238:209:07
12:11
#16235
23M
23.00 mi13:45:563:16:538:3415:30
12:23
#17412
24M
24.00 mi13:56:043:27:018:3810:08
10:08
#17690
40K
24.85 mi14:04:593:35:568:418:55
10:26
#17939
25.2M
25.20 mi14:09:013:39:588:444:02
11:42
#18074
Finish
26.22 mi14:19:313:50:288:4810:30
10:18
#18427
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi85861203120310573(Top 37%)2163(Top 18%)2163(Top 40%)
10K6.21 mi3.10 mi9141-5551440-2371440-2379784(Top 34%)1738(Top 14%)1738(Top 32%)
15K9.32 mi3.11 mi9591-4501650-2101650-21010573(Top 37%)2163(Top 18%)2163(Top 40%)
20K12.43 mi3.11 mi10142-5511934-2841934-28411848(Top 42%)2921(Top 24%)2921(Top 53%)
Half13.11 mi0.68 mi10326-1842031-972031-9713871(Top 49%)4010(Top 33%)4010(Top 73%)
25K15.53 mi2.42 mi11367-10412576-5452576-54516099(Top 57%)5371(Top 44%)5371(Top 98%)
30K18.64 mi3.11 mi13387-20203762-11863762-118619924(Top 70%)7618(Top 62%)7618(Top 139%)
20M20.00 mi1.36 mi14973-15864683-9214683-92124389(Top 86%)10161(Top 83%)10161(Top 186%)
21M21.00 mi1.00 mi15424-4514969-2864969-28620602(Top 73%)8243(Top 67%)8243(Top 151%)
35K21.75 mi0.75 mi16235-8115455-4865455-48626125(Top 92%)11151(Top 91%)11151(Top 204%)
23M23.00 mi1.25 mi17412-11776178-7236178-72325640(Top 90%)10926(Top 89%)10926(Top 200%)
24M24.00 mi1.00 mi17690-2786356-1786356-17821745(Top 77%)8994(Top 74%)8994(Top 164%)
40K24.85 mi0.85 mi17939-2496515-1596515-15921727(Top 76%)9052(Top 74%)9052(Top 166%)
25.2M25.20 mi0.35 mi18074-1356595-806595-8022559(Top 79%)9435(Top 77%)9435(Top 173%)
Finish26.22 mi1.02 mi18427-3536821-2266821-22623809(Top 84%)10071(Top 82%)10071(Top 184%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21story building
+97ft-345ft

Overall

10573

Females

2163

F18-39

2163

5K→10K

3.1 - 6.2 mi

Top 34%
×5story building
+79ft-138ft

Overall

9784

Females

1738

F18-39

1738

10K→15K

6.2 - 9.3 mi

Top 37%
×3story building
+67ft-78ft

Overall

10573

Females

2163

F18-39

2163

15K→20K

9.3 - 12.4 mi

Top 42%
×5story building
+106ft-86ft

Overall

11848

Females

2921

F18-39

2921

20K→Half

12.4 - 13.1 mi

Top 49%
×2story building
+19ft-37ft

Overall

13871

Females

4010

F18-39

4010

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

16099

Females

5371

F18-39

5371

25K→30K

15.5 - 18.6 mi

Top 70%
×9story building
+181ft-148ft

Overall

19924

Females

7618

F18-39

7618

30K→20M

18.6 - 20.0 mi

Top 86%
×5story building
+64ft-50ft

Overall

24389

Females

10161

F18-39

10161

20M→21M

20.0 - 21.0 mi

Top 73%
×8story building
+106ft-24ft

Overall

20602

Females

8243

F18-39

8243

21M→35K

21.0 - 21.8 mi

Top 92%
×7story building
+17ft-86ft

Overall

26125

Females

11151

F18-39

11151

35K→23M

21.8 - 23.0 mi

Top 90%
×5story building
+23ft-63ft

Overall

25640

Females

10926

F18-39

10926

23M→24M

23.0 - 24.0 mi

Top 77%
×6story building
+12ft-82ft

Overall

21745

Females

8994

F18-39

8994

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

21727

Females

9052

F18-39

9052

40K→25.2M

24.9 - 25.2 mi

Top 79%
×1story
+13ft-16ft

Overall

22559

Females

9435

F18-39

9435

25.2M→Finish

25.2 - 26.2 mi

Top 84%
×2story building
+22ft-21ft

Overall

23809

Females

10071

F18-39

10071

Passing Analysis

Category:
Athletes Passed
356
Passed By
10195
Net Change
-9841
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8586
5K → 10K54609-555#8586#9141
10K → 15K56506-450#9141#9591
15K → 20K76625-551#9591#10142
20K → Half3187-184#10142#10326
Half → 25K241065-1041#10326#11367
25K → 30K242044-2020#11367#13387
30K → 20M91595-1586#13387#14973
20M → 21M39490-451#14973#15424
21M → 35K5816-811#15424#16235
35K → 23M111188-1177#16235#17412
23M → 24M28306-278#17412#17690
24M → 40K16265-249#17690#17939
40K → 25.2M4139-135#17939#18074
25.2M → Finish7360-353#18074#18427
TOTALS35610195-9841
📊

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