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BOSTON MARATHON 2023

Sara Isaacson

Bib: 30641•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
31:07
Rank: #23479
Start → 5K
31:07 | 10:01/mi
10K· 6.21 mi
59:41
Rank: #22617 (+862)
5K → 10K
28:34 | 9:12/mi
15K· 9.32 mi
1:27:55
Rank: #22085 (+532)
10K → 15K
28:14 | 9:05/mi
20K· 12.43 mi
1:56:20
Rank: #21697 (+388)
15K → 20K
28:25 | 9:09/mi
Half· 13.11 mi
2:02:29
Rank: #21642 (+55)
20K → Half
6:09 | 9:01/mi
25K· 15.53 mi
2:25:12
Rank: #21430 (+212)
Half → 25K
22:43 | 9:22/mi
30K· 18.64 mi
2:55:08
Rank: #21165 (+265)
25K → 30K
29:56 | 9:38/mi
20M
3:08:11
Rank: #20987 (+178)
30K → 20M
13:03 | 9:36/mi
21M
3:18:11
Rank: #20818 (+169)
20M → 21M
10:00 | 10:00/mi
35K· 21.75 mi
3:24:59
Rank: #20715 (+103)
21M → 35K
6:48 | 9:05/mi
23M
3:36:33
Rank: #20514 (+201)
35K → 23M
11:34 | 9:14/mi
24M
3:45:52
Rank: #20427 (+87)
23M → 24M
9:19 | 9:19/mi
40K· 24.85 mi
3:53:28
Rank: #20270 (+157)
24M → 40K
7:36 | 8:53/mi
25.2M
3:56:30
Rank: #20190 (+80)
40K → 25.2M
3:02 | 8:48/mi
Finish· 26.22 mi
4:04:27
Rank: #19970 (+220)
25.2M → Finish
7:57 | 7:48/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time2:02:29
Pace9:21 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time2:01:58
Pace9:18 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:0631:0710:0131:07
10:01
-
10K
6.21 mi12:18:4059:419:3628:34
9:12
-0:49
15K
9.32 mi12:46:541:27:559:2628:14
9:05
-0:07
20K
12.43 mi13:15:191:56:209:2228:25
9:09
+0:04
Half
13.11 mi13:21:282:02:299:216:09
9:01
-0:08
25K
15.53 mi13:44:112:25:129:2122:43
9:22
+0:21
30K
18.64 mi14:14:072:55:089:2429:56
9:38
+0:16
20M
20.00 mi14:27:103:08:119:2513:03
9:36
-0:02
21M
21.00 mi14:37:103:18:119:2610:00
10:00
+0:24
35K
21.75 mi14:43:583:24:599:266:48
9:05
-0:55
23M
23.00 mi14:55:323:36:339:2511:34
9:14
+0:09
24M
24.00 mi15:04:513:45:529:259:19
9:19
+0:05
40K
24.85 mi15:12:273:53:289:247:36
8:53
-0:26
25.2M
25.20 mi15:15:293:56:309:233:02
8:48
-0:05
Finish
26.22 mi15:23:264:04:279:207:57
7:48
-1:00

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

7:48 /mi

Average Pace

9:20 /mi

Slowest Pace

10:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

18:35

8% of race

Time at Steady Pace

2:21:46

58% of race

Time at Slower Pace

1:24:06

34% of race

Average Pace: 9:19 /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 mi11:50:0631:0710:0131:07
10:01
#23479
10K
6.21 mi12:18:4059:419:3628:34
9:12
#22617
15K
9.32 mi12:46:541:27:559:2628:14
9:05
#22085
20K
12.43 mi13:15:191:56:209:2228:25
9:09
#21697
Half
13.11 mi13:21:282:02:299:216:09
9:01
#21642
25K
15.53 mi13:44:112:25:129:2122:43
9:22
#21430
30K
18.64 mi14:14:072:55:089:2429:56
9:38
#21165
20M
20.00 mi14:27:103:08:119:2513:03
9:36
#20987
21M
21.00 mi14:37:103:18:119:2610:00
10:00
#20818
35K
21.75 mi14:43:583:24:599:266:48
9:05
#20715
23M
23.00 mi14:55:323:36:339:2511:34
9:14
#20514
24M
24.00 mi15:04:513:45:529:259:19
9:19
#20427
40K
24.85 mi15:12:273:53:289:247:36
8:53
#20270
25.2M
25.20 mi15:15:293:56:309:233:02
8:48
#20190
Finish
26.22 mi15:23:264:04:279:207:57
7:48
#19970
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi234799640964020888(Top 78%)8182(Top 72%)8182(Top 168%)
10K6.21 mi3.10 mi22617+8629160+4809160+48021595(Top 81%)8600(Top 75%)8600(Top 176%)
15K9.32 mi3.11 mi22085+5328886+2748886+27420888(Top 78%)8182(Top 72%)8182(Top 168%)
20K12.43 mi3.11 mi21697+3888659+2278659+22720343(Top 76%)7871(Top 69%)7871(Top 161%)
Half13.11 mi0.68 mi21642+558633+268633+2620459(Top 77%)7954(Top 70%)7954(Top 163%)
25K15.53 mi2.42 mi21430+2128505+1288505+12820404(Top 77%)7932(Top 69%)7932(Top 162%)
30K18.64 mi3.11 mi21165+2658370+1358370+13519910(Top 75%)7717(Top 68%)7717(Top 158%)
20M20.00 mi1.36 mi20987+1788290+808290+8019216(Top 72%)7413(Top 65%)7413(Top 152%)
21M21.00 mi1.00 mi20818+1698203+878203+8718009(Top 68%)6773(Top 59%)6773(Top 139%)
35K21.75 mi0.75 mi20715+1038156+478156+4718226(Top 68%)6976(Top 61%)6976(Top 143%)
23M23.00 mi1.25 mi20514+2018061+958061+9517219(Top 65%)6418(Top 56%)6418(Top 131%)
24M24.00 mi1.00 mi20427+878022+398022+3918496(Top 69%)7173(Top 63%)7173(Top 147%)
40K24.85 mi0.85 mi20270+1577944+787944+7815506(Top 58%)5599(Top 49%)5599(Top 115%)
25.2M25.20 mi0.35 mi20190+807903+417903+4111171(Top 42%)3323(Top 29%)3323(Top 68%)
Finish26.22 mi1.02 mi19970+2207778+1257778+12510631(Top 40%)3022(Top 26%)3022(Top 62%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 78%
×21stories
+97ft-345ft

Overall

20888

Females

8182

F18-39

8182

5K→10K

3.1 - 6.2 mi

Top 81%
×5stories
+79ft-138ft

Overall

21595

Females

8600

F18-39

8600

10K→15K

6.2 - 9.3 mi

Top 78%
×3stories
+67ft-78ft

Overall

20888

Females

8182

F18-39

8182

15K→20K

9.3 - 12.4 mi

Top 76%
×5stories
+106ft-86ft

Overall

20343

Females

7871

F18-39

7871

20K→Half

12.4 - 13.1 mi

Top 77%
×2stories
+19ft-37ft

Overall

20459

Females

7954

F18-39

7954

Half→25K

13.1 - 15.5 mi

Top 77%
×4stories
+66ft-88ft

Overall

20404

Females

7932

F18-39

7932

25K→30K

15.5 - 18.6 mi

Top 75%
×9stories
+181ft-148ft

Overall

19910

Females

7717

F18-39

7717

30K→20M

18.6 - 20.0 mi

Top 72%
×5stories
+64ft-50ft

Overall

19216

Females

7413

F18-39

7413

20M→21M

20.0 - 21.0 mi

Top 68%
×8stories
+106ft-24ft

Overall

18009

Females

6773

F18-39

6773

21M→35K

21.0 - 21.8 mi

Top 68%
×7stories
+17ft-86ft

Overall

18226

Females

6976

F18-39

6976

35K→23M

21.8 - 23.0 mi

Top 65%
×5stories
+23ft-63ft

Overall

17219

Females

6418

F18-39

6418

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

18496

Females

7173

F18-39

7173

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

15506

Females

5599

F18-39

5599

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1story
+13ft-16ft

Overall

11171

Females

3323

F18-39

3323

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2stories
+22ft-21ft

Overall

10631

Females

3022

F18-39

3022

Passing Analysis

Category:
Athletes Passed
3630
Passed By
121
Net Change
+3509
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23479
5K → 10K87513+862#23479#22617
10K → 15K5419+532#22617#22085
15K → 20K40315+388#22085#21697
20K → Half572+55#21697#21642
Half → 25K23927+212#21642#21430
25K → 30K29429+265#21430#21165
30K → 20M1824+178#21165#20987
20M → 21M1723+169#20987#20818
21M → 35K1063+103#20818#20715
35K → 23M2032+201#20715#20514
23M → 24M9811+87#20514#20427
24M → 40K1603+157#20427#20270
40K → 25.2M800+80#20270#20190
25.2M → Finish2200+220#20190#19970
TOTALS3630121+3509
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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