Boston Marathon logo
BOSTON MARATHON 2023

Thom Lessner

PA

Bib: 10572 M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 30%
Gender (Male)
#0 / 15176
Top 44%
Masters (Masters Men)
#0 / 9891
Top 32%
Division (M45-49)
#0 / 2252
Top 42%
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
7:26/mi
23:05
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:25/mi
46:06
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:20/mi
1:08:52
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:26/mi
1:31:57
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:15/mi
1:36:54
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:28/mi
1:55:01
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:42/mi
2:18:56
↑ 181↓ 1480.2%
138 ft elev
20M
7:49/mi
2:29:33
↑ 64↓ 500.2%
148 ft elev
21M
8:05/mi
2:37:38
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:04/mi
2:42:55
↑ 17↓ 861.7%
156 ft elev
23M
7:15/mi
2:52:00
↑ 23↓ 630.6%
116 ft elev
24M
7:16/mi
2:59:16
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:29/mi
3:05:40
↓ 200.3%
20 ft elev
25.2M
7:56/mi
3:08:24
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:18/mi
3:15:50
↑ 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
1:36:547:23 /mi⚡ faster
2nd Half
1:38:567:33 /mi+2.1%
Positive split — 2.1% 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
23:057:263.11 mi23:05
7:26
-
10K
46:067:253.10 mi23:01
7:25
-0:01
15K
1:08:527:233.11 mi22:46
7:20
-0:05
20K
1:31:577:243.11 mi23:05
7:26
+0:06
Half(13.11 mi)
1:36:547:230.68 mi4:57
7:15
-0:11
25K
1:55:017:242.42 mi18:07
7:28
+0:13
30K
2:18:567:273.11 mi23:55
7:42
+0:14
20M
2:29:337:291.36 mi10:37
7:49
+0:07
21M
2:37:387:301.00 mi8:05
8:05
+0:16
35K
2:42:557:290.75 mi5:17
7:04
-1:01
23M
2:52:007:291.25 mi9:05
7:15
+0:11
24M
2:59:167:281.00 mi7:16
7:16
+0:01
40K
3:05:407:280.85 mi6:24
7:29
+0:13
25.2M
3:08:247:290.35 mi2:44
7:56
+0:27
Finish(26.22 mi)
3:15:507:281.02 mi7:26
7:18
-0:38
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

7:04 /mi

Average Pace

7:28 /mi

Slowest Pace

8:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

2:54:24

89% of race

Time at Steady Pace

21:26

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:28 /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 mi905876347634877974087408
10K3.10 mi9331-2737777-1437777-143967779737973
15K3.11 mi9098+2337618+1597618+159877974087408
20K3.11 mi8993+1057542+767542+76873373337333
Half(13.11 mi)0.68 mi8940+537510+327510+32821770317031
25K2.42 mi8863+777456+547456+54855771747174
30K3.11 mi8775+887369+877369+87861770457045
20M1.36 mi8773+27347+227347+22892771417141
21M1.00 mi8701+727284+637284+63787264026402
35K0.75 mi8564+1377183+1017183+101571150425042
23M1.25 mi8302+2627002+1817002+181508345324532
24M1.00 mi8160+1426885+1176885+117614951965196
40K0.85 mi8074+866813+726813+72662354115411
25.2M0.35 mi8026+486772+416772+41607550065006
Finish(26.22 mi)1.02 mi7959+676713+596713+59707656155615

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21story building
+97ft-345ft

Overall

8779

Males

7408

M45-49

7408

5K→10K

3.1 - 6.2 mi

Top 36%
×5story building
+79ft-138ft

Overall

9677

Males

7973

M45-49

7973

10K→15K

6.2 - 9.3 mi

Top 33%
×3story building
+67ft-78ft

Overall

8779

Males

7408

M45-49

7408

15K→20K

9.3 - 12.4 mi

Top 33%
×5story building
+106ft-86ft

Overall

8733

Males

7333

M45-49

7333

20K→Half

12.4 - 13.1 mi

Top 31%
×2story building
+19ft-37ft

Overall

8217

Males

7031

M45-49

7031

Half→25K

13.1 - 15.5 mi

Top 32%
×4story building
+66ft-88ft

Overall

8557

Males

7174

M45-49

7174

25K→30K

15.5 - 18.6 mi

Top 32%
×9story building
+181ft-148ft

Overall

8617

Males

7045

M45-49

7045

30K→20M

18.6 - 20.0 mi

Top 34%
×5story building
+64ft-50ft

Overall

8927

Males

7141

M45-49

7141

20M→21M

20.0 - 21.0 mi

Top 30%
×8story building
+106ft-24ft

Overall

7872

Males

6402

M45-49

6402

21M→35K

21.0 - 21.8 mi

Top 21%
×7story building
+17ft-86ft

Overall

5711

Males

5042

M45-49

5042

35K→23M

21.8 - 23.0 mi

Top 19%
×5story building
+23ft-63ft

Overall

5083

Males

4532

M45-49

4532

23M→24M

23.0 - 24.0 mi

Top 23%
×6story building
+12ft-82ft

Overall

6149

Males

5196

M45-49

5196

24M→40K

24.0 - 24.9 mi

Top 25%
×1story
+6ft-20ft

Overall

6623

Males

5411

M45-49

5411

40K→25.2M

24.9 - 25.2 mi

Top 23%
×1story
+13ft-16ft

Overall

6075

Males

5006

M45-49

5006

25.2M→Finish

25.2 - 26.2 mi

Top 27%
×2story building
+22ft-21ft

Overall

7076

Males

5615

M45-49

5615

Passing Analysis

Category:
▲Net Change
+0
0 passed by0 passed
SegmentMovementRank
Start → 5K-#9058
5K → 10K
433160-273
#9058 → #9331
10K → 15K
58291+233
#9331 → #9098
15K → 20K
71176+105
#9098 → #8993
20K → Half
558+53
#8993 → #8940
Half → 25K
56133+77
#8940 → #8863
25K → 30K
114202+88
#8863 → #8775
30K → 20M
7880+2
#8775 → #8773
20M → 21M
45117+72
#8773 → #8701
21M → 35K
2139+137
#8701 → #8564
35K → 23M
3265+262
#8564 → #8302
23M → 24M
6148+142
#8302 → #8160
24M → 40K
19105+86
#8160 → #8074
40K → 25.2M
755+48
#8074 → #8026
25.2M → Finish
35102+67
#8026 → #7959
TOTALS
9322031+1099
#9058 → #7959

Passing Visualized

Category:
Loading...

Passing Circle

Loading...

Position Flow

Loading...

Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing