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BOSTON MARATHON 2023

Libbi Gaiser

Bib: 27517•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F55-59)
#0 / 815
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ 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
9:44/mi
30:15
↑ 97↓ 3451.5%
10K· 6.21 mi
10:07/mi
1:01:41
↑ 79↓ 1380.4%
15K· 9.32 mi
10:10/mi
1:33:16
↑ 67↓ 78
20K· 12.43 mi
10:47/mi
2:06:47
↑ 106↓ 860.1%
Half· 13.11 mi
15:34/mi
2:17:24
↑ 19↓ 370.5%
25K· 15.53 mi
11:45/mi
2:45:53
↑ 66↓ 880.2%
30K· 18.64 mi
11:02/mi
3:20:11
↑ 181↓ 1480.2%
20M
11:06/mi
3:35:16
↑ 64↓ 500.2%
21M
13:19/mi
3:48:35
↑ 106↓ 241.6%
35K· 21.75 mi
11:00/mi
3:56:49
↑ 17↓ 861.7%
23M
12:00/mi
4:11:51
↑ 23↓ 630.6%
24M
11:53/mi
4:23:44
↓ 821.3%
40K· 24.85 mi
12:36/mi
4:34:30
↓ 200.3%
25.2M
13:09/mi
4:39:02
↑ 13↓ 160.2%
Finish· 26.22 mi
12:30/mi
4:51:46
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:17:24
Pace10:29 /mi
2nd Half
Distance13.11 mi
Time2:34:22
Pace11:47 /mi
📊Positive Split: 12.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:2830:159:4430:15
9:44
-
10K
6.21 mi12:18:541:01:419:5631:26
10:07
+0:23
15K
9.32 mi12:50:291:33:1610:0031:35
10:10
+0:03
20K
12.43 mi13:24:002:06:4710:1233:31
10:47
+0:37
Half
13.11 mi13:34:372:17:2410:2910:37
15:34
+4:47
25K
15.53 mi14:03:062:45:5310:4128:29
11:45
-3:49
30K
18.64 mi14:37:243:20:1110:4434:18
11:02
-0:43
20M
20.00 mi14:52:293:35:1610:4615:05
11:06
+0:04
21M
21.00 mi15:05:483:48:3510:5313:19
13:19
+2:13
35K
21.75 mi15:14:023:56:4910:538:14
11:00
-2:19
23M
23.00 mi15:29:044:11:5110:5715:02
12:00
+1:00
24M
24.00 mi15:40:574:23:4410:5911:53
11:53
-0:07
40K
24.85 mi15:51:434:34:3011:0310:46
12:36
+0:43
25.2M
25.20 mi15:56:154:39:0211:044:32
13:09
+0:33
Finish
26.22 mi16:08:594:51:4611:0812:44
12:30
-0:39

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

9:44 /mi

Average Pace

11:08 /mi

Slowest Pace

15:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:15:01

46% of race

Time at Steady Pace

1:44:47

36% of race

Time at Slower Pace

51:58

18% of race

Average Pace: 11:08 /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 mi11:47:2830:159:4430:15
9:44
#22763
10K
6.21 mi12:18:541:01:419:5631:26
10:07
#23461
15K
9.32 mi12:50:291:33:1610:0031:35
10:10
#23630
20K
12.43 mi13:24:002:06:4710:1233:31
10:47
#23825
Half
13.11 mi13:34:372:17:2410:2910:37
15:34
#24373
25K
15.53 mi14:03:062:45:5310:4128:29
11:45
#24520
30K
18.64 mi14:37:243:20:1110:4434:18
11:02
#24244
20M
20.00 mi14:52:293:35:1610:4615:05
11:06
#24142
21M
21.00 mi15:05:483:48:3510:5313:19
13:19
#24166
35K
21.75 mi15:14:023:56:4910:538:14
11:00
#24148
23M
23.00 mi15:29:044:11:5110:5715:02
12:00
#24153
24M
24.00 mi15:40:574:23:4410:5911:53
11:53
#24163
40K
24.85 mi15:51:434:34:3011:0310:46
12:36
#24193
25.2M
25.20 mi15:56:154:39:0211:044:32
13:09
#24192
Finish
26.22 mi16:08:594:51:4611:0812:44
12:30
#24296
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi227639266926623813(Top 89%)9792(Top 86%)9792(Top 1201%)
10K6.21 mi3.10 mi23461-6989603-3379603-33723955(Top 90%)9864(Top 86%)9864(Top 1210%)
15K9.32 mi3.11 mi23630-1699693-909693-9023813(Top 89%)9792(Top 86%)9792(Top 1201%)
20K12.43 mi3.11 mi23825-1959796-1039796-10324305(Top 91%)10090(Top 88%)10090(Top 1238%)
Half13.11 mi0.68 mi24373-54810108-31210108-31226604(Top 100%)11414(Top 100%)11414(Top 1400%)
25K15.53 mi2.42 mi24520-14710200-9210200-9224935(Top 94%)10481(Top 92%)10481(Top 1286%)
30K18.64 mi3.11 mi24244+27610068+13210068+13223155(Top 87%)9547(Top 84%)9547(Top 1171%)
20M20.00 mi1.36 mi24142+10210017+5110017+5122883(Top 86%)9454(Top 83%)9454(Top 1160%)
21M21.00 mi1.00 mi24166-2410043-2610043-2624415(Top 92%)10300(Top 90%)10300(Top 1264%)
35K21.75 mi0.75 mi24148+1810035+810035+823332(Top 88%)9783(Top 86%)9783(Top 1200%)
23M23.00 mi1.25 mi24153-510050-1510050-1524021(Top 90%)10140(Top 89%)10140(Top 1244%)
24M24.00 mi1.00 mi24163-1010057-710057-724381(Top 92%)10368(Top 91%)10368(Top 1272%)
40K24.85 mi0.85 mi24193-3010083-2610083-2624552(Top 92%)10458(Top 92%)10458(Top 1283%)
25.2M25.20 mi0.35 mi24192+110088-510088-524159(Top 91%)10264(Top 90%)10264(Top 1259%)
Finish26.22 mi1.02 mi24296-10410145-5710145-5725686(Top 96%)11022(Top 96%)11022(Top 1352%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 89%
×21story building
+97ft-345ft

Overall

23813

Females

9792

F55-59

9792

5K→10K

3.1 - 6.2 mi

Top 90%
×5story building
+79ft-138ft

Overall

23955

Females

9864

F55-59

9864

10K→15K

6.2 - 9.3 mi

Top 89%
×3story building
+67ft-78ft

Overall

23813

Females

9792

F55-59

9792

15K→20K

9.3 - 12.4 mi

Top 91%
×5story building
+106ft-86ft

Overall

24305

Females

10090

F55-59

10090

20K→Half

12.4 - 13.1 mi

Top 100%
×2story building
+19ft-37ft

Overall

26604

Females

11414

F55-59

11414

Half→25K

13.1 - 15.5 mi

Top 94%
×4story building
+66ft-88ft

Overall

24935

Females

10481

F55-59

10481

25K→30K

15.5 - 18.6 mi

Top 87%
×9story building
+181ft-148ft

Overall

23155

Females

9547

F55-59

9547

30K→20M

18.6 - 20.0 mi

Top 86%
×5story building
+64ft-50ft

Overall

22883

Females

9454

F55-59

9454

20M→21M

20.0 - 21.0 mi

Top 92%
×8story building
+106ft-24ft

Overall

24415

Females

10300

F55-59

10300

21M→35K

21.0 - 21.8 mi

Top 88%
×7story building
+17ft-86ft

Overall

23332

Females

9783

F55-59

9783

35K→23M

21.8 - 23.0 mi

Top 90%
×5story building
+23ft-63ft

Overall

24021

Females

10140

F55-59

10140

23M→24M

23.0 - 24.0 mi

Top 92%
×6story building
+12ft-82ft

Overall

24381

Females

10368

F55-59

10368

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

24552

Females

10458

F55-59

10458

40K→25.2M

24.9 - 25.2 mi

Top 91%
×1story
+13ft-16ft

Overall

24159

Females

10264

F55-59

10264

25.2M→Finish

25.2 - 26.2 mi

Top 96%
×2story building
+22ft-21ft

Overall

25686

Females

11022

F55-59

11022

Passing Analysis

Category:
Athletes Passed
762
Passed By
2295
Net Change
-1533
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22763
5K → 10K39737-698#22763#23461
10K → 15K57226-169#23461#23630
15K → 20K63258-195#23630#23825
20K → Half0548-548#23825#24373
Half → 25K37184-147#24373#24520
25K → 30K28913+276#24520#24244
30K → 20M11917+102#24244#24142
20M → 21M3256-24#24142#24166
21M → 35K2810+18#24166#24148
35K → 23M3237-5#24148#24153
23M → 24M2131-10#24153#24163
24M → 40K2656-30#24163#24193
40K → 25.2M1615+1#24193#24192
25.2M → Finish3107-104#24192#24296
TOTALS7622295-1533
📊

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