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BOSTON MARATHON 2023

Weijun Lannan

Bib: 21126•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 42%
Masters (Masters Women)
#0 / 6539
Top 30%
Division (F45-49)
#0 / 1817
Top 34%
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
8:30/mi
26:25
↑ 97↓ 3451.5%
10K· 6.21 mi
8:21/mi
52:21
↑ 79↓ 1380.4%
15K· 9.32 mi
8:24/mi
1:18:28
↑ 67↓ 78
20K· 12.43 mi
8:30/mi
1:44:53
↑ 106↓ 860.1%
Half· 13.11 mi
8:24/mi
1:50:37
↑ 19↓ 370.5%
25K· 15.53 mi
8:23/mi
2:10:56
↑ 66↓ 880.2%
30K· 18.64 mi
8:37/mi
2:37:41
↑ 181↓ 1480.2%
20M
8:26/mi
2:49:08
↑ 64↓ 500.2%
21M
8:53/mi
2:58:01
↑ 106↓ 241.6%
35K· 21.75 mi
7:38/mi
3:03:44
↑ 17↓ 861.7%
23M
8:07/mi
3:13:54
↑ 23↓ 630.6%
24M
7:51/mi
3:21:45
↓ 821.3%
40K· 24.85 mi
8:04/mi
3:28:39
↓ 200.3%
25.2M
8:42/mi
3:31:39
↑ 13↓ 160.2%
Finish· 26.22 mi
7:59/mi
3:39:47
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:50:37
Pace8:26 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:49:10
Pace8:20 /mi
📊Negative Split: 1.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:3626:258:3026:25
8:30
-
10K
6.21 mi11:49:3252:218:2525:56
8:21
-0:09
15K
9.32 mi12:15:391:18:288:2526:07
8:24
+0:03
20K
12.43 mi12:42:041:44:538:2626:25
8:30
+0:06
Half
13.11 mi12:47:481:50:378:265:44
8:24
-0:06
25K
15.53 mi13:08:072:10:568:2620:19
8:23
-0:01
30K
18.64 mi13:34:522:37:418:2826:45
8:37
+0:14
20M
20.00 mi13:46:192:49:088:2711:27
8:26
-0:11
21M
21.00 mi13:55:122:58:018:298:53
8:53
+0:27
35K
21.75 mi14:00:553:03:448:275:43
7:38
-1:15
23M
23.00 mi14:11:053:13:548:2610:10
8:07
+0:29
24M
24.00 mi14:18:563:21:458:247:51
7:51
-0:16
40K
24.85 mi14:25:503:28:398:246:54
8:04
+0:13
25.2M
25.20 mi14:28:503:31:398:243:00
8:42
+0:38
Finish
26.22 mi14:36:583:39:478:238:08
7:59
-0:43

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

7:38 /mi

Average Pace

8:23 /mi

Slowest Pace

8:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:25:01

39% of race

Time at Steady Pace

2:14:46

61% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:23 /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 mi11:23:3626:258:3026:25
8:30
#17580
10K
6.21 mi11:49:3252:218:2525:56
8:21
#17383
15K
9.32 mi12:15:391:18:288:2526:07
8:24
#17319
20K
12.43 mi12:42:041:44:538:2626:25
8:30
#17192
Half
13.11 mi12:47:481:50:378:265:44
8:24
#17181
25K
15.53 mi13:08:072:10:568:2620:19
8:23
#16913
30K
18.64 mi13:34:522:37:418:2826:45
8:37
#16516
20M
20.00 mi13:46:192:49:088:2711:27
8:26
#16259
21M
21.00 mi13:55:122:58:018:298:53
8:53
#16040
35K
21.75 mi14:00:553:03:448:275:43
7:38
#15792
23M
23.00 mi14:11:053:13:548:2610:10
8:07
#15500
24M
24.00 mi14:18:563:21:458:247:51
7:51
#15246
40K
24.85 mi14:25:503:28:398:246:54
8:04
#15079
25.2M
25.20 mi14:28:503:31:398:243:00
8:42
#15000
Finish
26.22 mi14:36:583:39:478:238:08
7:59
#14889
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi175806302630217185(Top 65%)6035(Top 53%)6035(Top 332%)
10K6.21 mi3.10 mi17383+1976151+1516151+15117227(Top 65%)6016(Top 53%)6016(Top 331%)
15K9.32 mi3.11 mi17319+646105+466105+4617185(Top 65%)6035(Top 53%)6035(Top 332%)
20K12.43 mi3.11 mi17192+1276043+626043+6216874(Top 63%)5857(Top 51%)5857(Top 322%)
Half13.11 mi0.68 mi17181+116032+116032+1117155(Top 64%)5971(Top 52%)5971(Top 329%)
25K15.53 mi2.42 mi16913+2685899+1335899+13315459(Top 58%)5114(Top 45%)5114(Top 281%)
30K18.64 mi3.11 mi16516+3975691+2085691+20814980(Top 56%)4916(Top 43%)4916(Top 271%)
20M20.00 mi1.36 mi16259+2575554+1375554+13713205(Top 50%)3974(Top 35%)3974(Top 219%)
21M21.00 mi1.00 mi16040+2195438+1165438+11612793(Top 48%)3844(Top 34%)3844(Top 212%)
35K21.75 mi0.75 mi15792+2485309+1295309+1299630(Top 36%)2215(Top 19%)2215(Top 122%)
23M23.00 mi1.25 mi15500+2925162+1475162+14710657(Top 40%)2860(Top 25%)2860(Top 157%)
24M24.00 mi1.00 mi15246+2545006+1565006+15610213(Top 38%)2706(Top 24%)2706(Top 149%)
40K24.85 mi0.85 mi15079+1674923+834923+8310578(Top 40%)2940(Top 26%)2940(Top 162%)
25.2M25.20 mi0.35 mi15000+794889+344889+3410873(Top 41%)3147(Top 28%)3147(Top 173%)
Finish26.22 mi1.02 mi14889+1114843+464843+4612036(Top 45%)3734(Top 33%)3734(Top 206%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21story building
+97ft-345ft

Overall

17185

Females

6035

F45-49

6035

5K→10K

3.1 - 6.2 mi

Top 65%
×5story building
+79ft-138ft

Overall

17227

Females

6016

F45-49

6016

10K→15K

6.2 - 9.3 mi

Top 65%
×3story building
+67ft-78ft

Overall

17185

Females

6035

F45-49

6035

15K→20K

9.3 - 12.4 mi

Top 63%
×5story building
+106ft-86ft

Overall

16874

Females

5857

F45-49

5857

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

17155

Females

5971

F45-49

5971

Half→25K

13.1 - 15.5 mi

Top 58%
×4story building
+66ft-88ft

Overall

15459

Females

5114

F45-49

5114

25K→30K

15.5 - 18.6 mi

Top 56%
×9story building
+181ft-148ft

Overall

14980

Females

4916

F45-49

4916

30K→20M

18.6 - 20.0 mi

Top 50%
×5story building
+64ft-50ft

Overall

13205

Females

3974

F45-49

3974

20M→21M

20.0 - 21.0 mi

Top 48%
×8story building
+106ft-24ft

Overall

12793

Females

3844

F45-49

3844

21M→35K

21.0 - 21.8 mi

Top 36%
×7story building
+17ft-86ft

Overall

9630

Females

2215

F45-49

2215

35K→23M

21.8 - 23.0 mi

Top 40%
×5story building
+23ft-63ft

Overall

10657

Females

2860

F45-49

2860

23M→24M

23.0 - 24.0 mi

Top 38%
×6story building
+12ft-82ft

Overall

10213

Females

2706

F45-49

2706

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

10578

Females

2940

F45-49

2940

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

10873

Females

3147

F45-49

3147

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2story building
+22ft-21ft

Overall

12036

Females

3734

F45-49

3734

Passing Analysis

Category:
Athletes Passed
3288
Passed By
597
Net Change
+2691
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17580
5K → 10K436239+197#17580#17383
10K → 15K224160+64#17383#17319
15K → 20K232105+127#17319#17192
20K → Half3322+11#17192#17181
Half → 25K28719+268#17181#16913
25K → 30K41821+397#16913#16516
30K → 20M2581+257#16516#16259
20M → 21M2223+219#16259#16040
21M → 35K2480+248#16040#15792
35K → 23M2920+292#15792#15500
23M → 24M2562+254#15500#15246
24M → 40K1714+167#15246#15079
40K → 25.2M823+79#15079#15000
25.2M → Finish12918+111#15000#14889
TOTALS3288597+2691
📊

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