Boston Marathon logo
BOSTON MARATHON 2023

Robert Lehr

Bib: 5108•M

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 11%
Gender (Male)
#0 / 15176
Top 19%
Masters (Masters Men)
#0 / 9891
Top 7%
Division (M40-44)
#0 / 2241
Top 19%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:23
Rank: #5404
Start → 5K
21:23 | 6:53/mi
10K· 6.21 mi
42:05
Rank: #4713 (+691)
5K → 10K
20:42 | 6:40/mi
15K· 9.32 mi
1:02:51
Rank: #4435 (+278)
10K → 15K
20:46 | 6:41/mi
20K· 12.43 mi
1:24:16
Rank: #4643 (-208)
15K → 20K
21:25 | 6:54/mi
Half· 13.11 mi
1:28:58
Rank: #4716 (-73)
20K → Half
4:42 | 6:53/mi
25K· 15.53 mi
1:45:17
Rank: #4474 (+242)
Half → 25K
16:19 | 6:44/mi
30K· 18.64 mi
2:06:45
Rank: #4311 (+163)
25K → 30K
21:28 | 6:55/mi
20M
2:16:08
Rank: #4217 (+94)
30K → 20M
9:23 | 6:54/mi
21M
2:23:31
Rank: #4169 (+48)
20M → 21M
7:23 | 7:23/mi
35K· 21.75 mi
2:28:25
Rank: #4085 (+84)
21M → 35K
4:54 | 6:33/mi
23M
2:36:28
Rank: #3780 (+305)
35K → 23M
8:03 | 6:26/mi
24M
2:42:35
Rank: #3503 (+277)
23M → 24M
6:07 | 6:07/mi
40K· 24.85 mi
2:47:53
Rank: #3297 (+206)
24M → 40K
5:18 | 6:12/mi
25.2M
2:50:10
Rank: #3212 (+85)
40K → 25.2M
2:17 | 6:37/mi
Finish· 26.22 mi
2:56:30
Rank: #3058 (+154)
25.2M → Finish
6:20 | 6:13/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via Half
Distance13.11 mi
Time1:28:58
Pace6:47 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:27:32
Pace6:41 /mi
📊Negative Split: 1.6% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:2321:236:5321:23
6:53
-
10K
6.21 mi10:45:0542:056:4620:42
6:40
-0:13
15K
9.32 mi11:05:511:02:516:4520:46
6:41
+0:01
20K
12.43 mi11:27:161:24:166:4721:25
6:54
+0:13
Half
13.11 mi11:31:581:28:586:474:42
6:53
-0:01
25K
15.53 mi11:48:171:45:176:4716:19
6:44
-0:09
30K
18.64 mi12:09:452:06:456:4821:28
6:55
+0:11
20M
20.00 mi12:19:082:16:086:489:23
6:54
-0:01
21M
21.00 mi12:26:312:23:316:507:23
7:23
+0:29
35K
21.75 mi12:31:252:28:256:494:54
6:33
-0:50
23M
23.00 mi12:39:282:36:286:488:03
6:26
-0:07
24M
24.00 mi12:45:352:42:356:466:07
6:07
-0:19
40K
24.85 mi12:50:532:47:536:455:18
6:12
+0:05
25.2M
25.20 mi12:53:102:50:106:452:17
6:37
+0:25
Finish
26.22 mi12:59:302:56:306:446:20
6:13
-0:24

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

6:07 /mi

Average Pace

6:44 /mi

Slowest Pace

7:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

25:48

15% of race

Time at Steady Pace

1:04:58

37% of race

Time at Slower Pace

1:25:44

49% of race

Average Pace: 6:44 /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 mi10:24:2321:236:5321:23
6:53
#5404
10K
6.21 mi10:45:0542:056:4620:42
6:40
#4713
15K
9.32 mi11:05:511:02:516:4520:46
6:41
#4435
20K
12.43 mi11:27:161:24:166:4721:25
6:54
#4643
Half
13.11 mi11:31:581:28:586:474:42
6:53
#4716
25K
15.53 mi11:48:171:45:176:4716:19
6:44
#4474
30K
18.64 mi12:09:452:06:456:4821:28
6:55
#4311
20M
20.00 mi12:19:082:16:086:489:23
6:54
#4217
21M
21.00 mi12:26:312:23:316:507:23
7:23
#4169
35K
21.75 mi12:31:252:28:256:494:54
6:33
#4085
23M
23.00 mi12:39:282:36:286:488:03
6:26
#3780
24M
24.00 mi12:45:352:42:356:466:07
6:07
#3503
40K
24.85 mi12:50:532:47:536:455:18
6:12
#3297
25.2M
25.20 mi12:53:102:50:106:452:17
6:37
#3212
Finish
26.22 mi12:59:302:56:306:446:20
6:13
#3058
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi5404498949893960(Top 15%)3721(Top 25%)3721(Top 166%)
10K6.21 mi3.10 mi4713+6914394+5954394+5953972(Top 15%)3738(Top 25%)3738(Top 167%)
15K9.32 mi3.11 mi4435+2784148+2464148+2463960(Top 15%)3721(Top 25%)3721(Top 166%)
20K12.43 mi3.11 mi4643-2084331-1834331-1835278(Top 20%)4871(Top 32%)4871(Top 217%)
Half13.11 mi0.68 mi4716-734395-644395-645851(Top 22%)5360(Top 35%)5360(Top 239%)
25K15.53 mi2.42 mi4474+2424185+2104185+2103588(Top 13%)3383(Top 22%)3383(Top 151%)
30K18.64 mi3.11 mi4311+1634039+1464039+1463706(Top 14%)3478(Top 23%)3478(Top 155%)
20M20.00 mi1.36 mi4217+943956+833956+833430(Top 13%)3202(Top 21%)3202(Top 143%)
21M21.00 mi1.00 mi4169+483906+503906+504035(Top 15%)3713(Top 24%)3713(Top 166%)
35K21.75 mi0.75 mi4085+843829+773829+772707(Top 10%)2550(Top 17%)2550(Top 114%)
23M23.00 mi1.25 mi3780+3053560+2693560+2691213(Top 5%)1147(Top 8%)1147(Top 51%)
24M24.00 mi1.00 mi3503+2773310+2503310+250811(Top 3%)769(Top 5%)769(Top 34%)
40K24.85 mi0.85 mi3297+2063119+1913119+191666(Top 3%)630(Top 4%)630(Top 28%)
25.2M25.20 mi0.35 mi3212+853038+813038+81753(Top 3%)718(Top 5%)718(Top 32%)
Finish26.22 mi1.02 mi3058+1542895+1432895+1431341(Top 5%)1271(Top 8%)1271(Top 57%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 15%
×21stories
+97ft-345ft

Overall

3960

Males

3721

M40-44

3721

5K→10K

3.1 - 6.2 mi

Top 15%
×5stories
+79ft-138ft

Overall

3972

Males

3738

M40-44

3738

10K→15K

6.2 - 9.3 mi

Top 15%
×3stories
+67ft-78ft

Overall

3960

Males

3721

M40-44

3721

15K→20K

9.3 - 12.4 mi

Top 20%
×5stories
+106ft-86ft

Overall

5278

Males

4871

M40-44

4871

20K→Half

12.4 - 13.1 mi

Top 22%
×2stories
+19ft-37ft

Overall

5851

Males

5360

M40-44

5360

Half→25K

13.1 - 15.5 mi

Top 13%
×4stories
+66ft-88ft

Overall

3588

Males

3383

M40-44

3383

25K→30K

15.5 - 18.6 mi

Top 14%
×9stories
+181ft-148ft

Overall

3706

Males

3478

M40-44

3478

30K→20M

18.6 - 20.0 mi

Top 13%
×5stories
+64ft-50ft

Overall

3430

Males

3202

M40-44

3202

20M→21M

20.0 - 21.0 mi

Top 15%
×8stories
+106ft-24ft

Overall

4035

Males

3713

M40-44

3713

21M→35K

21.0 - 21.8 mi

Top 10%
×7stories
+17ft-86ft

Overall

2707

Males

2550

M40-44

2550

35K→23M

21.8 - 23.0 mi

Top 5%
×5stories
+23ft-63ft

Overall

1213

Males

1147

M40-44

1147

23M→24M

23.0 - 24.0 mi

Top 3%
×6stories
+12ft-82ft

Overall

811

Males

769

M40-44

769

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

666

Males

630

M40-44

630

40K→25.2M

24.9 - 25.2 mi

Top 3%
×1story
+13ft-16ft

Overall

753

Males

718

M40-44

718

25.2M→Finish

25.2 - 26.2 mi

Top 5%
×2stories
+22ft-21ft

Overall

1341

Males

1271

M40-44

1271

Passing Analysis

Category:
Athletes Passed
2851
Passed By
505
Net Change
+2346
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5404
5K → 10K71221+691#5404#4713
10K → 15K30931+278#4713#4435
15K → 20K48256-208#4435#4643
20K → Half679-73#4643#4716
Half → 25K25210+242#4716#4474
25K → 30K20340+163#4474#4311
30K → 20M11218+94#4311#4217
20M → 21M9042+48#4217#4169
21M → 35K895+84#4169#4085
35K → 23M3050+305#4085#3780
23M → 24M2770+277#3780#3503
24M → 40K2071+206#3503#3297
40K → 25.2M850+85#3297#3212
25.2M → Finish1562+154#3212#3058
TOTALS2851505+2346
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing