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BOSTON MARATHON 2023

Barb Isom

Bib: 22412•F

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 46%
Division (F55-59)
#0 / 815
Top 22%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:23
Rank: #17512
Start → 5K
8:30/mi
26:23 split
10K· 6.21 mi
53:07
Rank: #18194 (-682)
5K → 10K
8:36/mi
26:44 split
15K· 9.32 mi
1:19:57
Rank: #18347 (-153)
10K → 15K
8:38/mi
26:50 split
20K· 12.43 mi
1:47:00
Rank: #18266 (+81)
15K → 20K
8:42/mi
27:03 split
Half· 13.11 mi
1:52:52
Rank: #18271 (-5)
20K → Half
8:36/mi
5:52 split
25K· 15.53 mi
2:14:07
Rank: #18170 (+101)
Half → 25K
8:46/mi
21:15 split
30K· 18.64 mi
2:42:11
Rank: #17979 (+191)
25K → 30K
9:02/mi
28:04 split
20M
2:54:29
Rank: #17868 (+111)
30K → 20M
9:03/mi
12:18 split
21M
3:04:09
Rank: #17793 (+75)
20M → 21M
9:40/mi
9:40 split
35K· 21.75 mi
3:10:33
Rank: #17701 (+92)
21M → 35K
8:33/mi
6:24 split
23M
3:21:48
Rank: #17607 (+94)
35K → 23M
8:59/mi
11:15 split
24M
3:30:26
Rank: #17513 (+94)
23M → 24M
8:38/mi
8:38 split
40K· 24.85 mi
3:38:04
Rank: #17442 (+71)
24M → 40K
8:56/mi
7:38 split
25.2M
3:41:17
Rank: #17398 (+44)
40K → 25.2M
9:20/mi
3:13 split
Finish· 26.22 mi
3:49:50
Rank: #17308 (+90)
25.2M → Finish
8:23/mi
8:33 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:52
Pace8:37 /mi
2nd Half
Distance13.11 mi
Time1:56:58
Pace8:55 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:5826:238:3026:23
8:30
-
10K
6.21 mi11:47:4253:078:3326:44
8:36
+0:06
15K
9.32 mi12:14:321:19:578:3526:50
8:38
+0:02
20K
12.43 mi12:41:351:47:008:3727:03
8:42
+0:04
Half
13.11 mi12:47:271:52:528:375:52
8:36
-0:06
25K
15.53 mi13:08:422:14:078:3821:15
8:46
+0:10
30K
18.64 mi13:36:462:42:118:4228:04
9:02
+0:16
20M
20.00 mi13:49:042:54:298:4312:18
9:03
+0:01
21M
21.00 mi13:58:443:04:098:469:40
9:40
+0:37
35K
21.75 mi14:05:083:10:338:466:24
8:33
-1:07
23M
23.00 mi14:16:233:21:488:4611:15
8:59
+0:26
24M
24.00 mi14:25:013:30:268:468:38
8:38
-0:21
40K
24.85 mi14:32:393:38:048:467:38
8:56
+0:18
25.2M
25.20 mi14:35:523:41:178:473:13
9:20
+0:24
Finish
26.22 mi14:44:253:49:508:468:33
8:23
-0:57

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

8:23 /mi

Average Pace

8:46 /mi

Slowest Pace

9:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:36:57

94% of race

Time at Steady Pace

12:53

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:46 /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 mi11:20:5826:238:3026:23
8:30
#17512
10K
6.21 mi11:47:4253:078:3326:44
8:36
#18194
15K
9.32 mi12:14:321:19:578:3526:50
8:38
#18347
20K
12.43 mi12:41:351:47:008:3727:03
8:42
#18266
Half
13.11 mi12:47:271:52:528:375:52
8:36
#18271
25K
15.53 mi13:08:422:14:078:3821:15
8:46
#18170
30K
18.64 mi13:36:462:42:118:4228:04
9:02
#17979
20M
20.00 mi13:49:042:54:298:4312:18
9:03
#17868
21M
21.00 mi13:58:443:04:098:469:40
9:40
#17793
35K
21.75 mi14:05:083:10:338:466:24
8:33
#17701
23M
23.00 mi14:16:233:21:488:4611:15
8:59
#17607
24M
24.00 mi14:25:013:30:268:468:38
8:38
#17513
40K
24.85 mi14:32:393:38:048:467:38
8:56
#17442
25.2M
25.20 mi14:35:523:41:178:473:13
9:20
#17398
Finish
26.22 mi14:44:253:49:508:468:33
8:23
#17308
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi175126261626118664(Top 70%)6897(Top 60%)6897(Top 846%)
10K6.21 mi3.10 mi18194-6826642-3816642-38118870(Top 71%)7003(Top 61%)7003(Top 859%)
15K9.32 mi3.11 mi18347-1536715-736715-7318664(Top 70%)6897(Top 60%)6897(Top 846%)
20K12.43 mi3.11 mi18266+816668+476668+4718166(Top 68%)6597(Top 58%)6597(Top 809%)
Half13.11 mi0.68 mi18271-56674-66674-618342(Top 69%)6677(Top 58%)6677(Top 819%)
25K15.53 mi2.42 mi18170+1016634+406634+4017759(Top 67%)6433(Top 56%)6433(Top 789%)
30K18.64 mi3.11 mi17979+1916552+826552+8217361(Top 65%)6279(Top 55%)6279(Top 770%)
20M20.00 mi1.36 mi17868+1116503+496503+4916825(Top 63%)6050(Top 53%)6050(Top 742%)
21M21.00 mi1.00 mi17793+756467+366467+3616731(Top 63%)6034(Top 53%)6034(Top 740%)
35K21.75 mi0.75 mi17701+926427+406427+4015645(Top 59%)5504(Top 48%)5504(Top 675%)
23M23.00 mi1.25 mi17607+946383+446383+4416021(Top 60%)5760(Top 50%)5760(Top 707%)
24M24.00 mi1.00 mi17513+946338+456338+4515309(Top 58%)5421(Top 47%)5421(Top 665%)
40K24.85 mi0.85 mi17442+716309+296309+2915800(Top 59%)5744(Top 50%)5744(Top 705%)
25.2M25.20 mi0.35 mi17398+446290+196290+1914427(Top 54%)4997(Top 44%)4997(Top 613%)
Finish26.22 mi1.02 mi17308+906249+416249+4114718(Top 55%)5115(Top 45%)5115(Top 628%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21story building
+97ft-345ft

Overall

18664

Females

6897

F55-59

6897

5K→10K

3.1 - 6.2 mi

Top 71%
×5story building
+79ft-138ft

Overall

18870

Females

7003

F55-59

7003

10K→15K

6.2 - 9.3 mi

Top 70%
×3story building
+67ft-78ft

Overall

18664

Females

6897

F55-59

6897

15K→20K

9.3 - 12.4 mi

Top 68%
×5story building
+106ft-86ft

Overall

18166

Females

6597

F55-59

6597

20K→Half

12.4 - 13.1 mi

Top 69%
×2story building
+19ft-37ft

Overall

18342

Females

6677

F55-59

6677

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

17759

Females

6433

F55-59

6433

25K→30K

15.5 - 18.6 mi

Top 65%
×9story building
+181ft-148ft

Overall

17361

Females

6279

F55-59

6279

30K→20M

18.6 - 20.0 mi

Top 63%
×5story building
+64ft-50ft

Overall

16825

Females

6050

F55-59

6050

20M→21M

20.0 - 21.0 mi

Top 63%
×8story building
+106ft-24ft

Overall

16731

Females

6034

F55-59

6034

21M→35K

21.0 - 21.8 mi

Top 59%
×7story building
+17ft-86ft

Overall

15645

Females

5504

F55-59

5504

35K→23M

21.8 - 23.0 mi

Top 60%
×5story building
+23ft-63ft

Overall

16021

Females

5760

F55-59

5760

23M→24M

23.0 - 24.0 mi

Top 58%
×6story building
+12ft-82ft

Overall

15309

Females

5421

F55-59

5421

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

15800

Females

5744

F55-59

5744

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

14427

Females

4997

F55-59

4997

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2story building
+22ft-21ft

Overall

14718

Females

5115

F55-59

5115

Passing Analysis

Category:
Athletes Passed
1771
Passed By
1567
Net Change
+204
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17512
5K → 10K87769-682#17512#18194
10K → 15K137290-153#18194#18347
15K → 20K195114+81#18347#18266
20K → Half2126-5#18266#18271
Half → 25K17574+101#18271#18170
25K → 30K29099+191#18170#17979
30K → 20M14635+111#17979#17868
20M → 21M11742+75#17868#17793
21M → 35K1008+92#17793#17701
35K → 23M13137+94#17701#17607
23M → 24M11521+94#17607#17513
24M → 40K9322+71#17513#17442
40K → 25.2M5713+44#17442#17398
25.2M → Finish10717+90#17398#17308
TOTALS17711567+204
📊

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