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BOSTON MARATHON 2023

Erik Larson

AZ

Bib: 11371 M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M45-49)
#0 / 2252
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
9:59/mi
31:00
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
10:59/mi
1:05:07
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
11:21/mi
1:40:24
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
13:37/mi
2:22:42
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
11:26/mi
2:30:30
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
14:51/mi
3:06:31
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
15:38/mi
3:55:05
↑ 181↓ 1480.2%
138 ft elev
20M
24:30/mi
4:28:23
↑ 64↓ 500.2%
148 ft elev
21M
13:58/mi
4:42:21
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
12:21/mi
4:51:35
↑ 17↓ 861.7%
156 ft elev
23M
12:40/mi
5:07:27
↑ 23↓ 630.6%
116 ft elev
24M
14:51/mi
5:22:18
↓ 821.3%
34 ft elev
40K· 24.85 mi
14:38/mi
5:34:49
↓ 200.3%
20 ft elev
25.2M
19:43/mi
5:41:37
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
14:10/mi
5:56:03
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
2:30:3011:29 /mi⚡ faster
2nd Half
3:25:3315:41 /mi+36.6%
Positive split — 36.6% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
31:009:593.11 mi31:00
9:59
-
10K
1:05:0710:293.10 mi34:07
10:59
+1:00
15K
1:40:2410:463.11 mi35:17
11:21
+0:22
20K
2:22:4211:293.11 mi42:18
13:37
+2:16
Half(13.11 mi)
2:30:3011:290.68 mi7:48
11:26
-2:11
25K
3:06:3112:002.42 mi36:01
14:51
+3:25
30K
3:55:0512:373.11 mi48:34
15:38
+0:47
20M
4:28:2313:251.36 mi33:18
24:30
+8:52
21M
4:42:2113:271.00 mi13:58
13:58
-10:32
35K
4:51:3513:240.75 mi9:14
12:21
-1:37
23M
5:07:2713:221.25 mi15:52
12:40
+0:19
24M
5:22:1813:261.00 mi14:51
14:51
+2:11
40K
5:34:4913:280.85 mi12:31
14:38
-0:13
25.2M
5:41:3713:330.35 mi6:48
19:43
+5:05
Finish(26.22 mi)
5:56:0313:351.02 mi14:26
14:10
-5:33
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

9:59 /mi

Average Pace

13:35 /mi

Slowest Pace

24:30 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

1:48:12

30% of race

Time at Steady Pace

3:27:45

58% of race

Time at Slower Pace

40:06

11% of race

Average Pace: 13:35 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi233811376913769255611475314753
10K3.10 mi24685-130414408-63914408-639254481472614726
15K3.11 mi25098-41314582-17414582-174255611475314753
20K3.11 mi25778-68014841-25914841-259264481510415104
Half(13.11 mi)0.68 mi25756+2214828+1314828+13254251466414664
25K2.42 mi26014-25814938-11014938-110265321513315133
30K3.11 mi26196-18215005-6715005-67265371513615136
20M1.36 mi26510-31415123-11815123-118266141517215172
21M1.00 mi26490+2015117+615117+6250181438014380
35K0.75 mi26466+2415111+615111+6250191433514335
23M1.25 mi26410+5615087+2415087+24247691423114231
24M1.00 mi26422-1215090-315090-3263561501515015
40K0.85 mi26418+415084+615084+6260061480814808
25.2M0.35 mi26442-2415094-1015094-10265801514915149
Finish(26.22 mi)1.02 mi26457-1515100-615100-6263811502015020

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 96%
×21story building
+97ft-345ft

Overall

25561

Males

14753

M45-49

14753

5K→10K

3.1 - 6.2 mi

Top 96%
×5story building
+79ft-138ft

Overall

25448

Males

14726

M45-49

14726

10K→15K

6.2 - 9.3 mi

Top 96%
×3story building
+67ft-78ft

Overall

25561

Males

14753

M45-49

14753

15K→20K

9.3 - 12.4 mi

Top 99%
×5story building
+106ft-86ft

Overall

26448

Males

15104

M45-49

15104

20K→Half

12.4 - 13.1 mi

Top 96%
×2story building
+19ft-37ft

Overall

25425

Males

14664

M45-49

14664

Half→25K

13.1 - 15.5 mi

Top 100%
×4story building
+66ft-88ft

Overall

26532

Males

15133

M45-49

15133

25K→30K

15.5 - 18.6 mi

Top 100%
×9story building
+181ft-148ft

Overall

26537

Males

15136

M45-49

15136

30K→20M

18.6 - 20.0 mi

Top 100%
×5story building
+64ft-50ft

Overall

26614

Males

15172

M45-49

15172

20M→21M

20.0 - 21.0 mi

Top 94%
×8story building
+106ft-24ft

Overall

25018

Males

14380

M45-49

14380

21M→35K

21.0 - 21.8 mi

Top 94%
×7story building
+17ft-86ft

Overall

25019

Males

14335

M45-49

14335

35K→23M

21.8 - 23.0 mi

Top 93%
×5story building
+23ft-63ft

Overall

24769

Males

14231

M45-49

14231

23M→24M

23.0 - 24.0 mi

Top 99%
×6story building
+12ft-82ft

Overall

26356

Males

15015

M45-49

15015

24M→40K

24.0 - 24.9 mi

Top 98%
×1story
+6ft-20ft

Overall

26006

Males

14808

M45-49

14808

40K→25.2M

24.9 - 25.2 mi

Top 100%
×1story
+13ft-16ft

Overall

26580

Males

15149

M45-49

15149

25.2M→Finish

25.2 - 26.2 mi

Top 99%
×2story building
+22ft-21ft

Overall

26381

Males

15020

M45-49

15020

Passing Analysis

Category:
Passed
176
Passed By
3252
Net Change
-3076
SegmentPassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23381
5K → 10K21306-1304#23381#24685
10K → 15K13426-413#24685#25098
15K → 20K4684-680#25098#25778
20K → Half286+22#25778#25756
Half → 25K5263-258#25756#26014
25K → 30K6188-182#26014#26196
30K → 20M0314-314#26196#26510
20M → 21M211+20#26510#26490
21M → 35K240+24#26490#26466
35K → 23M560+56#26466#26410
23M → 24M315-12#26410#26422
24M → 40K128+4#26422#26418
40K → 25.2M024-24#26418#26442
25.2M → Finish217-15#26442#26457
TOTALS1763252-3076

Passing Charts

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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