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BOSTON MARATHON 2023

Sinthy Kounlasa

Bib: 23845•F

NH

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F65-69)
#0 / 221
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
9:27/mi
29:23
↑ 97↓ 3451.5%
10K· 6.21 mi
9:41/mi
59:29
↑ 79↓ 1380.4%
15K· 9.32 mi
9:52/mi
1:30:08
↑ 67↓ 78
20K· 12.43 mi
10:21/mi
2:02:18
↑ 106↓ 860.1%
Half· 13.11 mi
10:10/mi
2:09:14
↑ 19↓ 370.5%
25K· 15.53 mi
10:55/mi
2:35:42
↑ 66↓ 880.2%
30K· 18.64 mi
11:12/mi
3:10:30
↑ 181↓ 1480.2%
20M
11:11/mi
3:25:42
↑ 64↓ 500.2%
21M
12:19/mi
3:38:01
↑ 106↓ 241.6%
35K· 21.75 mi
10:32/mi
3:45:54
↑ 17↓ 861.7%
23M
11:29/mi
4:00:17
↑ 23↓ 630.6%
24M
10:48/mi
4:11:05
↓ 821.3%
40K· 24.85 mi
11:32/mi
4:20:57
↓ 200.3%
25.2M
12:05/mi
4:25:07
↑ 13↓ 160.2%
Finish· 26.22 mi
11:09/mi
4:36:29
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:09:14
Pace9:51 /mi
2nd Half
Distance13.11 mi
Time2:27:15
Pace11:14 /mi
📊Positive Split: 13.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:3729:239:2729:23
9:27
-
10K
6.21 mi11:54:4359:299:3430:06
9:41
+0:14
15K
9.32 mi12:25:221:30:089:4030:39
9:52
+0:11
20K
12.43 mi12:57:322:02:189:5032:10
10:21
+0:29
Half
13.11 mi13:04:282:09:149:516:56
10:10
-0:11
25K
15.53 mi13:30:562:35:4210:0126:28
10:55
+0:45
30K
18.64 mi14:05:443:10:3010:1334:48
11:12
+0:17
20M
20.00 mi14:20:563:25:4210:1715:12
11:11
-0:01
21M
21.00 mi14:33:153:38:0110:2312:19
12:19
+1:08
35K
21.75 mi14:41:083:45:5410:237:53
10:32
-1:47
23M
23.00 mi14:55:314:00:1710:2714:23
11:29
+0:57
24M
24.00 mi15:06:194:11:0510:2810:48
10:48
-0:41
40K
24.85 mi15:16:114:20:5710:309:52
11:32
+0:44
25.2M
25.20 mi15:20:214:25:0710:314:10
12:05
+0:33
Finish
26.22 mi15:31:434:36:2910:3311:22
11:09
-0:56

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

9:27 /mi

Average Pace

10:33 /mi

Slowest Pace

12:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:09:14

47% of race

Time at Steady Pace

1:46:31

39% of race

Time at Slower Pace

40:44

15% of race

Average Pace: 10:33 /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 mi11:24:3729:239:2729:23
9:27
#21978
10K
6.21 mi11:54:4359:299:3430:06
9:41
#22531
15K
9.32 mi12:25:221:30:089:4030:39
9:52
#22786
20K
12.43 mi12:57:322:02:189:5032:10
10:21
#23038
Half
13.11 mi13:04:282:09:149:516:56
10:10
#23068
25K
15.53 mi13:30:562:35:4210:0126:28
10:55
#23256
30K
18.64 mi14:05:443:10:3010:1334:48
11:12
#23275
20M
20.00 mi14:20:563:25:4210:1715:12
11:11
#23258
21M
21.00 mi14:33:153:38:0110:2312:19
12:19
#23262
35K
21.75 mi14:41:083:45:5410:237:53
10:32
#23219
23M
23.00 mi14:55:314:00:1710:2714:23
11:29
#23234
24M
24.00 mi15:06:194:11:0510:2810:48
10:48
#23205
40K
24.85 mi15:16:114:20:5710:309:52
11:32
#23208
25.2M
25.20 mi15:20:214:25:0710:314:10
12:05
#23200
Finish
26.22 mi15:31:434:36:2910:3311:22
11:09
#23250
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF65-69Seg. OverallSeg. FemalesSeg. F65-69
5K3.11 mi3.11 mi219788871887123223(Top 87%)9459(Top 83%)9459(Top 4280%)
10K6.21 mi3.10 mi22531-5539114-2439114-24323029(Top 87%)9348(Top 82%)9348(Top 4230%)
15K9.32 mi3.11 mi22786-2559227-1139227-11323223(Top 87%)9459(Top 83%)9459(Top 4280%)
20K12.43 mi3.11 mi23038-2529368-1419368-14123578(Top 89%)9677(Top 85%)9677(Top 4379%)
Half13.11 mi0.68 mi23068-309388-209388-2023613(Top 89%)9687(Top 85%)9687(Top 4383%)
25K15.53 mi2.42 mi23256-1889485-979485-9723837(Top 90%)9867(Top 86%)9867(Top 4465%)
30K18.64 mi3.11 mi23275-199524-399524-3923419(Top 88%)9692(Top 85%)9692(Top 4386%)
20M20.00 mi1.36 mi23258+179532-89532-823003(Top 86%)9515(Top 83%)9515(Top 4305%)
21M21.00 mi1.00 mi23262-49538-69538-623227(Top 87%)9670(Top 85%)9670(Top 4376%)
35K21.75 mi0.75 mi23219+439525+139525+1322472(Top 84%)9310(Top 82%)9310(Top 4213%)
23M23.00 mi1.25 mi23234-159543-189543-1823231(Top 87%)9713(Top 85%)9713(Top 4395%)
24M24.00 mi1.00 mi23205+299535+89535+822672(Top 85%)9459(Top 83%)9459(Top 4280%)
40K24.85 mi0.85 mi23208-39546-119546-1123277(Top 87%)9812(Top 86%)9812(Top 4440%)
25.2M25.20 mi0.35 mi23200+89549-39549-322672(Top 85%)9490(Top 83%)9490(Top 4294%)
Finish26.22 mi1.02 mi23250-509580-319580-3124238(Top 91%)10272(Top 90%)10272(Top 4648%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 87%
×21story building
+97ft-345ft

Overall

23223

Females

9459

F65-69

9459

5K→10K

3.1 - 6.2 mi

Top 87%
×5story building
+79ft-138ft

Overall

23029

Females

9348

F65-69

9348

10K→15K

6.2 - 9.3 mi

Top 87%
×3story building
+67ft-78ft

Overall

23223

Females

9459

F65-69

9459

15K→20K

9.3 - 12.4 mi

Top 89%
×5story building
+106ft-86ft

Overall

23578

Females

9677

F65-69

9677

20K→Half

12.4 - 13.1 mi

Top 89%
×2story building
+19ft-37ft

Overall

23613

Females

9687

F65-69

9687

Half→25K

13.1 - 15.5 mi

Top 90%
×4story building
+66ft-88ft

Overall

23837

Females

9867

F65-69

9867

25K→30K

15.5 - 18.6 mi

Top 88%
×9story building
+181ft-148ft

Overall

23419

Females

9692

F65-69

9692

30K→20M

18.6 - 20.0 mi

Top 86%
×5story building
+64ft-50ft

Overall

23003

Females

9515

F65-69

9515

20M→21M

20.0 - 21.0 mi

Top 87%
×8story building
+106ft-24ft

Overall

23227

Females

9670

F65-69

9670

21M→35K

21.0 - 21.8 mi

Top 84%
×7story building
+17ft-86ft

Overall

22472

Females

9310

F65-69

9310

35K→23M

21.8 - 23.0 mi

Top 87%
×5story building
+23ft-63ft

Overall

23231

Females

9713

F65-69

9713

23M→24M

23.0 - 24.0 mi

Top 85%
×6story building
+12ft-82ft

Overall

22672

Females

9459

F65-69

9459

24M→40K

24.0 - 24.9 mi

Top 87%
×1story
+6ft-20ft

Overall

23277

Females

9812

F65-69

9812

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

22672

Females

9490

F65-69

9490

25.2M→Finish

25.2 - 26.2 mi

Top 91%
×2story building
+22ft-21ft

Overall

24238

Females

10272

F65-69

10272

Passing Analysis

Category:
Athletes Passed
692
Passed By
1964
Net Change
-1272
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21978
5K → 10K67620-553#21978#22531
10K → 15K69324-255#22531#22786
15K → 20K65317-252#22786#23038
20K → Half1747-30#23038#23068
Half → 25K44232-188#23068#23256
25K → 30K116135-19#23256#23275
30K → 20M6649+17#23275#23258
20M → 21M3539-4#23258#23262
21M → 35K5512+43#23262#23219
35K → 23M3550-15#23219#23234
23M → 24M4415+29#23234#23205
24M → 40K3841-3#23205#23208
40K → 25.2M2719+8#23208#23200
25.2M → Finish1464-50#23200#23250
TOTALS6921964-1272
📊

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