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BOSTON MARATHON 2023

Junia Larsen

Bib: 12102•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 36%
Gender (Female)
#0 / 11423
Top 16%
Masters (Masters Women)
#0 / 6539
Top 7%
Division (F45-49)
#0 / 1817
Top 6%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:41
Rank: #10753
Start → 5K
23:41 | 7:37/mi
10K· 6.21 mi
47:06
Rank: #10748 (+5)
5K → 10K
23:25 | 7:32/mi
15K· 9.32 mi
1:10:49
Rank: #10913 (-165)
10K → 15K
23:43 | 7:38/mi
20K· 12.43 mi
1:34:35
Rank: #10801 (+112)
15K → 20K
23:46 | 7:39/mi
Half· 13.11 mi
1:39:45
Rank: #10803 (-2)
20K → Half
5:10 | 7:34/mi
25K· 15.53 mi
1:58:11
Rank: #10552 (+251)
Half → 25K
18:26 | 7:36/mi
30K· 18.64 mi
2:22:16
Rank: #10223 (+329)
25K → 30K
24:05 | 7:45/mi
20M
2:32:44
Rank: #10042 (+181)
30K → 20M
10:28 | 7:42/mi
21M
2:40:48
Rank: #9872 (+170)
20M → 21M
8:04 | 8:04/mi
35K· 21.75 mi
2:46:23
Rank: #9803 (+69)
21M → 35K
5:35 | 7:28/mi
23M
2:56:16
Rank: #9716 (+87)
35K → 23M
9:53 | 7:54/mi
24M
3:03:56
Rank: #9646 (+70)
23M → 24M
7:40 | 7:40/mi
40K· 24.85 mi
3:10:38
Rank: #9588 (+58)
24M → 40K
6:42 | 7:50/mi
25.2M
3:13:32
Rank: #9555 (+33)
40K → 25.2M
2:54 | 8:25/mi
Finish· 26.22 mi
3:21:14
Rank: #9520 (+35)
25.2M → Finish
7:42 | 7:33/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:45
Pace7:37 /mi
2nd Half
Distance13.11 mi
Time1:41:29
Pace7:44 /mi
📊Positive Split: 1.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:1923:417:3723:41
7:37
-
10K
6.21 mi11:14:4447:067:3523:25
7:32
-0:05
15K
9.32 mi11:38:271:10:497:3623:43
7:38
+0:06
20K
12.43 mi12:02:131:34:357:3723:46
7:39
+0:01
Half
13.11 mi12:07:231:39:457:375:10
7:34
-0:05
25K
15.53 mi12:25:491:58:117:3618:26
7:36
+0:02
30K
18.64 mi12:49:542:22:167:3824:05
7:45
+0:09
20M
20.00 mi13:00:222:32:447:3810:28
7:42
-0:03
21M
21.00 mi13:08:262:40:487:398:04
8:04
+0:22
35K
21.75 mi13:14:012:46:237:395:35
7:28
-0:36
23M
23.00 mi13:23:542:56:167:409:53
7:54
+0:26
24M
24.00 mi13:31:343:03:567:407:40
7:40
-0:14
40K
24.85 mi13:38:163:10:387:406:42
7:50
+0:10
25.2M
25.20 mi13:41:103:13:327:412:54
8:25
+0:35
Finish
26.22 mi13:48:523:21:147:417:42
7:33
-0:52

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

7:28 /mi

Average Pace

7:41 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:18:20

99% of race

Time at Steady Pace

2:54

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:40 /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 mi10:51:1923:417:3723:41
7:37
#10753
10K
6.21 mi11:14:4447:067:3523:25
7:32
#10748
15K
9.32 mi11:38:271:10:497:3623:43
7:38
#10913
20K
12.43 mi12:02:131:34:357:3723:46
7:39
#10801
Half
13.11 mi12:07:231:39:457:375:10
7:34
#10803
25K
15.53 mi12:25:491:58:117:3618:26
7:36
#10552
30K
18.64 mi12:49:542:22:167:3824:05
7:45
#10223
20M
20.00 mi13:00:222:32:447:3810:28
7:42
#10042
21M
21.00 mi13:08:262:40:487:398:04
8:04
#9872
35K
21.75 mi13:14:012:46:237:395:35
7:28
#9803
23M
23.00 mi13:23:542:56:167:409:53
7:54
#9716
24M
24.00 mi13:31:343:03:567:407:40
7:40
#9646
40K
24.85 mi13:38:163:10:387:406:42
7:50
#9588
25.2M
25.20 mi13:41:103:13:327:412:54
8:25
#9555
Finish
26.22 mi13:48:523:21:147:417:42
7:33
#9520
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi107532201220111303(Top 42%)2513(Top 22%)2513(Top 138%)
10K6.21 mi3.10 mi10748+52199+22199+210790(Top 41%)2196(Top 19%)2196(Top 121%)
15K9.32 mi3.11 mi10913-1652287-882287-8811303(Top 42%)2513(Top 22%)2513(Top 138%)
20K12.43 mi3.11 mi10801+1122247+402247+4010516(Top 40%)2148(Top 19%)2148(Top 118%)
Half13.11 mi0.68 mi10803-22245+22245+210844(Top 41%)2273(Top 20%)2273(Top 125%)
25K15.53 mi2.42 mi10552+2512119+1262119+1269579(Top 36%)1817(Top 16%)1817(Top 100%)
30K18.64 mi3.11 mi10223+3292009+1102009+1109012(Top 34%)1715(Top 15%)1715(Top 94%)
20M20.00 mi1.36 mi10042+1811941+681941+688239(Top 31%)1498(Top 13%)1498(Top 82%)
21M21.00 mi1.00 mi9872+1701887+541887+547832(Top 29%)1447(Top 13%)1447(Top 80%)
35K21.75 mi0.75 mi9803+691873+141873+148331(Top 31%)1633(Top 14%)1633(Top 90%)
23M23.00 mi1.25 mi9716+871868+51868+59056(Top 34%)2058(Top 18%)2058(Top 113%)
24M24.00 mi1.00 mi9646+701861+71861+78879(Top 33%)2041(Top 18%)2041(Top 112%)
40K24.85 mi0.85 mi9588+581862-11862-18926(Top 34%)2142(Top 19%)2142(Top 118%)
25.2M25.20 mi0.35 mi9555+331866-41866-49016(Top 34%)2242(Top 20%)2242(Top 123%)
Finish26.22 mi1.02 mi9520+351872-61872-68980(Top 34%)2231(Top 20%)2231(Top 123%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21stories
+97ft-345ft

Overall

11303

Females

2513

F45-49

2513

5K→10K

3.1 - 6.2 mi

Top 41%
×5stories
+79ft-138ft

Overall

10790

Females

2196

F45-49

2196

10K→15K

6.2 - 9.3 mi

Top 42%
×3stories
+67ft-78ft

Overall

11303

Females

2513

F45-49

2513

15K→20K

9.3 - 12.4 mi

Top 40%
×5stories
+106ft-86ft

Overall

10516

Females

2148

F45-49

2148

20K→Half

12.4 - 13.1 mi

Top 41%
×2stories
+19ft-37ft

Overall

10844

Females

2273

F45-49

2273

Half→25K

13.1 - 15.5 mi

Top 36%
×4stories
+66ft-88ft

Overall

9579

Females

1817

F45-49

1817

25K→30K

15.5 - 18.6 mi

Top 34%
×9stories
+181ft-148ft

Overall

9012

Females

1715

F45-49

1715

30K→20M

18.6 - 20.0 mi

Top 31%
×5stories
+64ft-50ft

Overall

8239

Females

1498

F45-49

1498

20M→21M

20.0 - 21.0 mi

Top 29%
×8stories
+106ft-24ft

Overall

7832

Females

1447

F45-49

1447

21M→35K

21.0 - 21.8 mi

Top 31%
×7stories
+17ft-86ft

Overall

8331

Females

1633

F45-49

1633

35K→23M

21.8 - 23.0 mi

Top 34%
×5stories
+23ft-63ft

Overall

9056

Females

2058

F45-49

2058

23M→24M

23.0 - 24.0 mi

Top 33%
×6stories
+12ft-82ft

Overall

8879

Females

2041

F45-49

2041

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

8926

Females

2142

F45-49

2142

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1story
+13ft-16ft

Overall

9016

Females

2242

F45-49

2242

25.2M→Finish

25.2 - 26.2 mi

Top 34%
×2stories
+22ft-21ft

Overall

8980

Females

2231

F45-49

2231

Passing Analysis

Category:
Athletes Passed
2209*
Passed By
976
Net Change
+1233
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10753
5K → 10K305300+5#10753#10748
10K → 15K122287-165#10748#10913
15K → 20K214102+112#10913#10801
20K → Half2729-2#10801#10803
Half → 25K27221+251#10803#10552
25K → 30K357*28+329#10552#10223
30K → 20M198*17+181#10223#10042
20M → 21M188*18+170#10042#9872
21M → 35K789+69#9872#9803
35K → 23M12942+87#9803#9716
23M → 24M10131+70#9716#9646
24M → 40K83*25+58#9646#9588
40K → 25.2M5522+33#9588#9555
25.2M → Finish8045+35#9555#9520
TOTALS2209*976+1233

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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