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BOSTON MARATHON 2023

Yanrong (rosy) Li

OR

Bib: 21525 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 45%
Masters (Masters Women)
#0 / 6539
Top 34%
Division (F50-54)
#0 / 1207
Top 25%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
8:27/mi
26:14
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:12/mi
51:42
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:16/mi
1:17:22
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:24/mi
1:43:28
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:05/mi
1:48:59
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:15/mi
2:08:59
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:33/mi
2:35:33
↑ 181↓ 1480.2%
138 ft elev
20M
8:35/mi
2:47:13
↑ 64↓ 500.2%
148 ft elev
21M
9:17/mi
2:56:30
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:21/mi
3:02:45
↑ 17↓ 861.7%
156 ft elev
23M
8:46/mi
3:13:43
↑ 23↓ 630.6%
116 ft elev
24M
8:31/mi
3:22:14
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:46/mi
3:29:44
↓ 200.3%
20 ft elev
25.2M
9:28/mi
3:33:00
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:41/mi
3:41:51
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:59
Pace8:19 /mi
2nd Half
Distance13.11 mi
Time1:52:52
Pace8:37 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:0026:148:2726:14
8:27
-
10K
6.21 mi11:44:2851:428:1925:28
8:12
-0:15
15K
9.32 mi12:10:081:17:228:1825:40
8:16
+0:04
20K
12.43 mi12:36:141:43:288:2026:06
8:24
+0:08
Half
13.11 mi12:41:451:48:598:195:31
8:05
-0:19
25K
15.53 mi13:01:452:08:598:1820:00
8:15
+0:10
30K
18.64 mi13:28:192:35:338:2126:34
8:33
+0:18
20M
20.00 mi13:39:592:47:138:2211:40
8:35
+0:02
21M
21.00 mi13:49:162:56:308:249:17
9:17
+0:42
35K
21.75 mi13:55:313:02:458:246:15
8:21
-0:56
23M
23.00 mi14:06:293:13:438:2510:58
8:46
+0:25
24M
24.00 mi14:15:003:22:148:268:31
8:31
-0:15
40K
24.85 mi14:22:303:29:448:267:30
8:46
+0:15
25.2M
25.20 mi14:25:463:33:008:273:16
9:28
+0:42
Finish
26.22 mi14:34:373:41:518:288:51
8:41
-0:47

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

8:05 /mi

Average Pace

8:28 /mi

Slowest Pace

9:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:29:18

94% of race

Time at Steady Pace

12:33

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:28 /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 mi11:19:0026:148:2726:14
8:27
#17179
10K
6.21 mi11:44:2851:428:1925:28
8:12
#16658
15K
9.32 mi12:10:081:17:228:1825:40
8:16
#16522
20K
12.43 mi12:36:141:43:288:2026:06
8:24
#16468
Half
13.11 mi12:41:451:48:598:195:31
8:05
#16387
25K
15.53 mi13:01:452:08:598:1820:00
8:15
#16055
30K
18.64 mi13:28:192:35:338:2126:34
8:33
#15778
20M
20.00 mi13:39:592:47:138:2211:40
8:35
#15619
21M
21.00 mi13:49:162:56:308:249:17
9:17
#15563
35K
21.75 mi13:55:313:02:458:246:15
8:21
#15515
23M
23.00 mi14:06:293:13:438:2510:58
8:46
#15443
24M
24.00 mi14:15:003:22:148:268:31
8:31
#15406
40K
24.85 mi14:22:303:29:448:267:30
8:46
#15383
25.2M
25.20 mi14:25:463:33:008:273:16
9:28
#15361
Finish
26.22 mi14:34:373:41:518:288:51
8:41
#15408
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi171796049604916298(Top 61%)5473(Top 48%)5473(Top 453%)
10K6.21 mi3.10 mi16658+5215678+3715678+37116235(Top 61%)5420(Top 47%)5420(Top 449%)
15K9.32 mi3.11 mi16522+1365612+665612+6616298(Top 61%)5473(Top 48%)5473(Top 453%)
20K12.43 mi3.11 mi16468+545587+255587+2516253(Top 61%)5498(Top 48%)5498(Top 456%)
Half13.11 mi0.68 mi16387+815542+455542+4515115(Top 57%)4760(Top 42%)4760(Top 394%)
25K15.53 mi2.42 mi16055+3325371+1715371+17114605(Top 55%)4593(Top 40%)4593(Top 381%)
30K18.64 mi3.11 mi15778+2775240+1315240+13114631(Top 55%)4712(Top 41%)4712(Top 390%)
20M20.00 mi1.36 mi15619+1595163+775163+7714205(Top 53%)4547(Top 40%)4547(Top 377%)
21M21.00 mi1.00 mi15563+565153+105153+1014920(Top 56%)5009(Top 44%)5009(Top 415%)
35K21.75 mi0.75 mi15515+485143+105143+1014482(Top 54%)4834(Top 42%)4834(Top 400%)
23M23.00 mi1.25 mi15443+725127+165127+1614780(Top 56%)5056(Top 44%)5056(Top 419%)
24M24.00 mi1.00 mi15406+375114+135114+1314592(Top 55%)5014(Top 44%)5014(Top 415%)
40K24.85 mi0.85 mi15383+235114511414958(Top 56%)5273(Top 46%)5273(Top 437%)
25.2M25.20 mi0.35 mi15361+225113+15113+115108(Top 57%)5362(Top 47%)5362(Top 444%)
Finish26.22 mi1.02 mi15408-475153-405153-4016412(Top 62%)6049(Top 53%)6049(Top 501%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21story building
+97ft-345ft

Overall

16298

Females

5473

F50-54

5473

5K→10K

3.1 - 6.2 mi

Top 61%
×5story building
+79ft-138ft

Overall

16235

Females

5420

F50-54

5420

10K→15K

6.2 - 9.3 mi

Top 61%
×3story building
+67ft-78ft

Overall

16298

Females

5473

F50-54

5473

15K→20K

9.3 - 12.4 mi

Top 61%
×5story building
+106ft-86ft

Overall

16253

Females

5498

F50-54

5498

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

15115

Females

4760

F50-54

4760

Half→25K

13.1 - 15.5 mi

Top 55%
×4story building
+66ft-88ft

Overall

14605

Females

4593

F50-54

4593

25K→30K

15.5 - 18.6 mi

Top 55%
×9story building
+181ft-148ft

Overall

14631

Females

4712

F50-54

4712

30K→20M

18.6 - 20.0 mi

Top 53%
×5story building
+64ft-50ft

Overall

14205

Females

4547

F50-54

4547

20M→21M

20.0 - 21.0 mi

Top 56%
×8story building
+106ft-24ft

Overall

14920

Females

5009

F50-54

5009

21M→35K

21.0 - 21.8 mi

Top 54%
×7story building
+17ft-86ft

Overall

14482

Females

4834

F50-54

4834

35K→23M

21.8 - 23.0 mi

Top 56%
×5story building
+23ft-63ft

Overall

14780

Females

5056

F50-54

5056

23M→24M

23.0 - 24.0 mi

Top 55%
×6story building
+12ft-82ft

Overall

14592

Females

5014

F50-54

5014

24M→40K

24.0 - 24.9 mi

Top 56%
×1story
+6ft-20ft

Overall

14958

Females

5273

F50-54

5273

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

15108

Females

5362

F50-54

5362

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2story building
+22ft-21ft

Overall

16412

Females

6049

F50-54

6049

Passing Analysis

Category:
Athletes Passed
2599
Passed By
828
Net Change
+1771
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17179
5K → 10K652131+521#17179#16658
10K → 15K277141+136#16658#16522
15K → 20K188134+54#16522#16468
20K → Half865+81#16468#16387
Half → 25K34715+332#16387#16055
25K → 30K33154+277#16055#15778
30K → 20M17314+159#15778#15619
20M → 21M10549+56#15619#15563
21M → 35K7022+48#15563#15515
35K → 23M11947+72#15515#15443
23M → 24M8346+37#15443#15406
24M → 40K7047+23#15406#15383
40K → 25.2M4018+22#15383#15361
25.2M → Finish58105-47#15361#15408
TOTALS2599828+1771
📊

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