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BOSTON MARATHON 2023

Shereen Sairafi

Bib: 17610•F

CO

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 41%
Division (F18-39)
#0 / 4884
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
8:16/mi
25:41
↑ 97↓ 3451.5%
10K· 6.21 mi
8:11/mi
51:08
↑ 79↓ 1380.4%
15K· 9.32 mi
8:25/mi
1:17:16
↑ 67↓ 78
20K· 12.43 mi
8:21/mi
1:43:13
↑ 106↓ 860.1%
Half· 13.11 mi
8:12/mi
1:48:49
↑ 19↓ 370.5%
25K· 15.53 mi
8:30/mi
2:09:26
↑ 66↓ 880.2%
30K· 18.64 mi
8:38/mi
2:36:14
↑ 181↓ 1480.2%
20M
8:23/mi
2:47:38
↑ 64↓ 500.2%
21M
8:57/mi
2:56:35
↑ 106↓ 241.6%
35K· 21.75 mi
8:13/mi
3:02:44
↑ 17↓ 861.7%
23M
8:23/mi
3:13:14
↑ 23↓ 630.6%
24M
7:59/mi
3:21:13
↓ 821.3%
40K· 24.85 mi
8:00/mi
3:28:03
↓ 200.3%
25.2M
8:48/mi
3:31:05
↑ 13↓ 160.2%
Finish· 26.22 mi
7:27/mi
3:38:41
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:48:49
Pace8:18 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:49:52
Pace8:23 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:0525:418:1625:41
8:16
-
10K
6.21 mi11:43:3251:088:1425:27
8:11
-0:05
15K
9.32 mi12:09:401:17:168:1726:08
8:25
+0:14
20K
12.43 mi12:35:371:43:138:1825:57
8:21
-0:04
Half
13.11 mi12:41:131:48:498:185:36
8:12
-0:09
25K
15.53 mi13:01:502:09:268:2020:37
8:30
+0:18
30K
18.64 mi13:28:382:36:148:2326:48
8:38
+0:08
20M
20.00 mi13:40:022:47:388:2311:24
8:23
-0:15
21M
21.00 mi13:48:592:56:358:258:57
8:57
+0:34
35K
21.75 mi13:55:083:02:448:246:09
8:13
-0:44
23M
23.00 mi14:05:383:13:148:2410:30
8:23
+0:10
24M
24.00 mi14:13:373:21:138:237:59
7:59
-0:24
40K
24.85 mi14:20:273:28:038:226:50
8:00
+0:01
25.2M
25.20 mi14:23:293:31:058:233:02
8:48
+0:48
Finish
26.22 mi14:31:053:38:418:217:36
7:27
-1:21

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

7:27 /mi

Average Pace

8:21 /mi

Slowest Pace

8:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

22:25

10% of race

Time at Steady Pace

2:37:29

72% of race

Time at Slower Pace

38:47

18% of race

Average Pace: 8:20 /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 mi11:18:0525:418:1625:41
8:16
#15938
10K
6.21 mi11:43:3251:088:1425:27
8:11
#16029
15K
9.32 mi12:09:401:17:168:1726:08
8:25
#16453
20K
12.43 mi12:35:371:43:138:1825:57
8:21
#16320
Half
13.11 mi12:41:131:48:498:185:36
8:12
#16283
25K
15.53 mi13:01:502:09:268:2020:37
8:30
#16269
30K
18.64 mi13:28:382:36:148:2326:48
8:38
#16029
20M
20.00 mi13:40:022:47:388:2311:24
8:23
#15753
21M
21.00 mi13:48:592:56:358:258:57
8:57
#15583
35K
21.75 mi13:55:083:02:448:246:09
8:13
#15504
23M
23.00 mi14:05:383:13:148:2410:30
8:23
#15300
24M
24.00 mi14:13:373:21:138:237:59
7:59
#15103
40K
24.85 mi14:20:273:28:038:226:50
8:00
#14919
25.2M
25.20 mi14:23:293:31:058:233:02
8:48
#14846
Finish
26.22 mi14:31:053:38:418:217:36
7:27
#14607
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi159385234523417222(Top 65%)6053(Top 53%)6053(Top 124%)
10K6.21 mi3.10 mi16029-915295-615295-6116200(Top 61%)5397(Top 47%)5397(Top 111%)
15K9.32 mi3.11 mi16453-4245559-2645559-26417222(Top 65%)6053(Top 53%)6053(Top 124%)
20K12.43 mi3.11 mi16320+1335500+595500+5915952(Top 60%)5318(Top 47%)5318(Top 109%)
Half13.11 mi0.68 mi16283+375478+225478+2215875(Top 60%)5207(Top 46%)5207(Top 107%)
25K15.53 mi2.42 mi16269+145496-185496-1816219(Top 61%)5566(Top 49%)5566(Top 114%)
30K18.64 mi3.11 mi16029+2405393+1035393+10315070(Top 57%)4973(Top 44%)4973(Top 102%)
20M20.00 mi1.36 mi15753+2765239+1545239+15412999(Top 49%)3868(Top 34%)3868(Top 79%)
21M21.00 mi1.00 mi15583+1705167+725167+7213149(Top 49%)4030(Top 35%)4030(Top 83%)
35K21.75 mi0.75 mi15504+795133+345133+3413637(Top 51%)4372(Top 38%)4372(Top 90%)
23M23.00 mi1.25 mi15300+2045029+1045029+10412528(Top 47%)3818(Top 33%)3818(Top 78%)
24M24.00 mi1.00 mi15103+1974915+1144915+11411167(Top 42%)3191(Top 28%)3191(Top 65%)
40K24.85 mi0.85 mi14919+1844830+854830+8510063(Top 38%)2700(Top 24%)2700(Top 55%)
25.2M25.20 mi0.35 mi14846+734798+324798+3211427(Top 43%)3439(Top 30%)3439(Top 70%)
Finish26.22 mi1.02 mi14607+2394666+1324666+1328296(Top 31%)1971(Top 17%)1971(Top 40%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21story building
+97ft-345ft

Overall

17222

Females

6053

F18-39

6053

5K→10K

3.1 - 6.2 mi

Top 61%
×5story building
+79ft-138ft

Overall

16200

Females

5397

F18-39

5397

10K→15K

6.2 - 9.3 mi

Top 65%
×3story building
+67ft-78ft

Overall

17222

Females

6053

F18-39

6053

15K→20K

9.3 - 12.4 mi

Top 60%
×5story building
+106ft-86ft

Overall

15952

Females

5318

F18-39

5318

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

15875

Females

5207

F18-39

5207

Half→25K

13.1 - 15.5 mi

Top 61%
×4story building
+66ft-88ft

Overall

16219

Females

5566

F18-39

5566

25K→30K

15.5 - 18.6 mi

Top 57%
×9story building
+181ft-148ft

Overall

15070

Females

4973

F18-39

4973

30K→20M

18.6 - 20.0 mi

Top 49%
×5story building
+64ft-50ft

Overall

12999

Females

3868

F18-39

3868

20M→21M

20.0 - 21.0 mi

Top 49%
×8story building
+106ft-24ft

Overall

13149

Females

4030

F18-39

4030

21M→35K

21.0 - 21.8 mi

Top 51%
×7story building
+17ft-86ft

Overall

13637

Females

4372

F18-39

4372

35K→23M

21.8 - 23.0 mi

Top 47%
×5story building
+23ft-63ft

Overall

12528

Females

3818

F18-39

3818

23M→24M

23.0 - 24.0 mi

Top 42%
×6story building
+12ft-82ft

Overall

11167

Females

3191

F18-39

3191

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10063

Females

2700

F18-39

2700

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

11427

Females

3439

F18-39

3439

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8296

Females

1971

F18-39

1971

Passing Analysis

Category:
Athletes Passed
2556
Passed By
1225
Net Change
+1331
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15938
5K → 10K251342-91#15938#16029
10K → 15K82506-424#16029#16453
15K → 20K237104+133#16453#16320
20K → Half5821+37#16320#16283
Half → 25K146132+14#16283#16269
25K → 30K30868+240#16269#16029
30K → 20M2804+276#16029#15753
20M → 21M18515+170#15753#15583
21M → 35K9011+79#15583#15504
35K → 23M2139+204#15504#15300
23M → 24M2025+197#15300#15103
24M → 40K1873+184#15103#14919
40K → 25.2M774+73#14919#14846
25.2M → Finish2401+239#14846#14607
TOTALS25561225+1331
📊

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