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BOSTON MARATHON 2025

Libby Collier

Bib: 9361•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 18%
Gender (Female)
#0 / 12228
Top 4%
Division (F18-39)
#0 / 5469
Top 7%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:19
Rank: #6792
Start → 5K
6:52/mi
21:19 split
10K· 6.21 mi
42:27
Rank: #6600 (+192)
5K → 10K
6:48/mi
21:08 split
15K· 9.32 mi
1:03:35
Rank: #6430 (+170)
10K → 15K
6:48/mi
21:08 split
20K· 12.43 mi
1:24:56
Rank: #6269 (+161)
15K → 20K
6:52/mi
21:21 split
Half· 13.11 mi
1:29:33
Rank: #6244 (+25)
20K → Half
6:46/mi
4:37 split
25K· 15.53 mi
1:46:21
Rank: #6131 (+113)
Half → 25K
6:56/mi
16:48 split
30K· 18.64 mi
2:08:38
Rank: #5993 (+138)
25K → 30K
7:10/mi
22:17 split
20M
2:18:27
Rank: #5891 (+102)
30K → 20M
7:13/mi
9:49 split
21M
2:26:03
Rank: #5782 (+109)
20M → 21M
7:36/mi
7:36 split
35K· 21.75 mi
2:31:16
Rank: #5737 (+45)
21M → 35K
6:58/mi
5:13 split
23M
2:40:13
Rank: #5597 (+140)
35K → 23M
7:09/mi
8:57 split
24M
2:47:22
Rank: #5529 (+68)
23M → 24M
7:09/mi
7:09 split
40K· 24.85 mi
2:53:17
Rank: #5412 (+117)
24M → 40K
6:55/mi
5:55 split
25.2M
2:55:49
Rank: #5338 (+74)
40K → 25.2M
7:21/mi
2:32 split
Finish· 26.22 mi
3:02:16
Rank: #5173 (+165)
25.2M → Finish
6:20/mi
6:27 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:33
Pace6:50 /mi
2nd Half
Distance13.11 mi
Time1:32:43
Pace7:04 /mi
📊Positive Split: 3.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:3721:196:5221:19
6:52
-
10K
6.21 mi11:07:4542:276:5021:08
6:48
-0:04
15K
9.32 mi11:28:531:03:356:4921:08
6:48
0:00
20K
12.43 mi11:50:141:24:566:5021:21
6:52
+0:04
Half
13.11 mi11:54:511:29:336:504:37
6:46
-0:06
25K
15.53 mi12:11:391:46:216:5116:48
6:56
+0:10
30K
18.64 mi12:33:562:08:386:5422:17
7:10
+0:14
20M
20.00 mi12:43:452:18:276:559:49
7:13
+0:03
21M
21.00 mi12:51:212:26:036:577:36
7:36
+0:23
35K
21.75 mi12:56:342:31:166:575:13
6:58
-0:38
23M
23.00 mi13:05:312:40:136:588:57
7:09
+0:11
24M
24.00 mi13:12:402:47:226:587:09
7:09
0:00
40K
24.85 mi13:18:352:53:176:585:55
6:55
-0:14
25.2M
25.20 mi13:21:072:55:496:592:32
7:21
+0:26
Finish
26.22 mi13:27:343:02:166:576:27
6:20
-1:01

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

6:20 /mi

Average Pace

6:57 /mi

Slowest Pace

7:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:58:43

65% of race

Time at Steady Pace

55:57

31% of race

Time at Slower Pace

7:36

4% of race

Average Pace: 6:57 /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 mi10:46:3721:196:5221:19
6:52
#6792
10K
6.21 mi11:07:4542:276:5021:08
6:48
#6600
15K
9.32 mi11:28:531:03:356:4921:08
6:48
#6430
20K
12.43 mi11:50:141:24:566:5021:21
6:52
#6269
Half
13.11 mi11:54:511:29:336:504:37
6:46
#6244
25K
15.53 mi12:11:391:46:216:5116:48
6:56
#6131
30K
18.64 mi12:33:562:08:386:5422:17
7:10
#5993
20M
20.00 mi12:43:452:18:276:559:49
7:13
#5891
21M
21.00 mi12:51:212:26:036:577:36
7:36
#5782
35K
21.75 mi12:56:342:31:166:575:13
6:58
#5737
23M
23.00 mi13:05:312:40:136:588:57
7:09
#5597
24M
24.00 mi13:12:402:47:226:587:09
7:09
#5529
40K
24.85 mi13:18:352:53:176:585:55
6:55
#5412
25.2M
25.20 mi13:21:072:55:496:592:32
7:21
#5338
Finish
26.22 mi13:27:343:02:166:576:27
6:20
#5173
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi67926296296123(Top 22%)550(Top 4%)550(Top 10%)
10K6.21 mi3.10 mi6600+192596+33596+336431(Top 23%)589(Top 5%)589(Top 11%)
15K9.32 mi3.11 mi6430+170572+24572+246123(Top 22%)550(Top 4%)550(Top 10%)
20K12.43 mi3.11 mi6269+161560+12560+125993(Top 21%)548(Top 4%)548(Top 10%)
Half13.11 mi0.68 mi6244+25559+1559+15926(Top 21%)524(Top 4%)524(Top 10%)
25K15.53 mi2.42 mi6131+113557+2557+25866(Top 21%)563(Top 5%)563(Top 10%)
30K18.64 mi3.11 mi5993+138543+14543+145757(Top 20%)606(Top 5%)606(Top 11%)
20M20.00 mi1.36 mi5891+102542+1542+15354(Top 19%)594(Top 5%)594(Top 11%)
21M21.00 mi1.00 mi5782+109523+19523+195146(Top 18%)646(Top 5%)646(Top 12%)
35K21.75 mi0.75 mi5737+45525-2525-25202(Top 18%)659(Top 5%)659(Top 12%)
23M23.00 mi1.25 mi5597+140512+13512+134626(Top 16%)571(Top 5%)571(Top 10%)
24M24.00 mi1.00 mi5529+68515-3515-35463(Top 19%)888(Top 7%)888(Top 16%)
40K24.85 mi0.85 mi5412+117500+15500+153503(Top 12%)383(Top 3%)383(Top 7%)
25.2M25.20 mi0.35 mi5338+74494+6494+62826(Top 10%)302(Top 2%)302(Top 6%)
Finish26.22 mi1.02 mi5173+165469+25469+252039(Top 7%)162(Top 1%)162(Top 3%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 22%
×21story building
+97ft-345ft

Overall

6123

Females

550

F18-39

550

5K→10K

3.1 - 6.2 mi

Top 23%
×5story building
+79ft-138ft

Overall

6431

Females

589

F18-39

589

10K→15K

6.2 - 9.3 mi

Top 22%
×3story building
+67ft-78ft

Overall

6123

Females

550

F18-39

550

15K→20K

9.3 - 12.4 mi

Top 21%
×5story building
+106ft-86ft

Overall

5993

Females

548

F18-39

548

20K→Half

12.4 - 13.1 mi

Top 21%
×2story building
+19ft-37ft

Overall

5926

Females

524

F18-39

524

Half→25K

13.1 - 15.5 mi

Top 21%
×4story building
+66ft-88ft

Overall

5866

Females

563

F18-39

563

25K→30K

15.5 - 18.6 mi

Top 20%
×9story building
+181ft-148ft

Overall

5757

Females

606

F18-39

606

30K→20M

18.6 - 20.0 mi

Top 19%
×5story building
+64ft-50ft

Overall

5354

Females

594

F18-39

594

20M→21M

20.0 - 21.0 mi

Top 18%
×8story building
+106ft-24ft

Overall

5146

Females

646

F18-39

646

21M→35K

21.0 - 21.8 mi

Top 18%
×7story building
+17ft-86ft

Overall

5202

Females

659

F18-39

659

35K→23M

21.8 - 23.0 mi

Top 16%
×5story building
+23ft-63ft

Overall

4626

Females

571

F18-39

571

23M→24M

23.0 - 24.0 mi

Top 19%
×6story building
+12ft-82ft

Overall

5463

Females

888

F18-39

888

24M→40K

24.0 - 24.9 mi

Top 12%
×1story
+6ft-20ft

Overall

3503

Females

383

F18-39

383

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2826

Females

302

F18-39

302

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2story building
+22ft-21ft

Overall

2039

Females

162

F18-39

162

Passing Analysis

Category:
Athletes Passed
2148
Passed By
529
Net Change
+1619
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6792
5K → 10K302110+192#6792#6600
10K → 15K25080+170#6600#6430
15K → 20K21655+161#6430#6269
20K → Half4116+25#6269#6244
Half → 25K17158+113#6244#6131
25K → 30K240102+138#6131#5993
30K → 20M12725+102#5993#5891
20M → 21M12617+109#5891#5782
21M → 35K6419+45#5782#5737
35K → 23M15818+140#5737#5597
23M → 24M9022+68#5597#5529
24M → 40K1225+117#5529#5412
40K → 25.2M740+74#5412#5338
25.2M → Finish1672+165#5338#5173
TOTALS2148529+1619
📊

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