Boston Marathon logo
BOSTON MARATHON 2023

Robert Larkin

MA

Bib: 25049 M

0:00
0:00
/ mi
Masters
Be the first to cheer!
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
8:45/mi
27:11
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
8:34/mi
53:47
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
8:48/mi
1:21:07
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:52/mi
1:48:39
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:48/mi
1:54:39
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
9:06/mi
2:16:42
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
10:04/mi
2:47:57
↑ 181↓ 1480.2%
138 ft elev
20M
10:25/mi
3:02:07
↑ 64↓ 500.2%
148 ft elev
21M
13:04/mi
3:15:11
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
11:40/mi
3:23:55
↑ 17↓ 861.7%
156 ft elev
23M
14:00/mi
3:41:27
↑ 23↓ 630.6%
116 ft elev
24M
11:46/mi
3:53:13
↓ 821.3%
34 ft elev
40K· 24.85 mi
12:59/mi
4:04:19
↓ 200.3%
20 ft elev
25.2M
14:53/mi
4:09:27
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
10:48/mi
4:20:27
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Is this your race?

Claim it for a free AI report on this race

A one-of-a-kind AI Race Performance Report that reads your race like a coach. A plain-English story of how you raced, where you surged and faded, and what it all means. Emailed to you, free.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:39
Pace8:45 /mi
2nd Half
Distance13.11 mi
Time2:25:48
Pace11:07 /mi
📊Positive Split: 27.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:43:2027:118:4527:11
8:45
-
10K
6.21 mi12:09:5653:478:3926:36
8:34
-0:11
15K
9.32 mi12:37:161:21:078:4227:20
8:48
+0:14
20K
12.43 mi13:04:481:48:398:4527:32
8:52
+0:04
Half
13.11 mi13:10:481:54:398:456:00
8:48
-0:04
25K
15.53 mi13:32:512:16:428:4822:03
9:06
+0:18
30K
18.64 mi14:04:062:47:579:0131:15
10:04
+0:58
20M
20.00 mi14:18:163:02:079:0614:10
10:25
+0:21
21M
21.00 mi14:31:203:15:119:1813:04
13:04
+2:39
35K
21.75 mi14:40:043:23:559:238:44
11:40
-1:24
23M
23.00 mi14:57:363:41:279:3817:32
14:00
+2:20
24M
24.00 mi15:09:223:53:139:4311:46
11:46
-2:14
40K
24.85 mi15:20:284:04:199:5011:06
12:59
+1:13
25.2M
25.20 mi15:25:364:09:279:545:08
14:53
+1:54
Finish
26.22 mi15:36:364:20:279:5611:00
10:48
-4:05

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

8:34 /mi

Average Pace

9:56 /mi

Slowest Pace

14:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:16:42

52% of race

Time at Steady Pace

56:25

22% of race

Time at Slower Pace

1:07:20

26% of race

Average Pace: 9:56 /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 mi11:43:2027:118:4527:11
8:45
#19174
10K
6.21 mi12:09:5653:478:3926:36
8:34
#18832
15K
9.32 mi12:37:161:21:078:4227:20
8:48
#19055
20K
12.43 mi13:04:481:48:398:4527:32
8:52
#19026
Half
13.11 mi13:10:481:54:398:456:00
8:48
#19049
25K
15.53 mi13:32:512:16:428:4822:03
9:06
#19085
30K
18.64 mi14:04:062:47:579:0131:15
10:04
#19632
20M
20.00 mi14:18:163:02:079:0614:10
10:25
#19846
21M
21.00 mi14:31:203:15:119:1813:04
13:04
#20314
35K
21.75 mi14:40:043:23:559:238:44
11:40
#20547
23M
23.00 mi14:57:363:41:279:3817:32
14:00
#21214
24M
24.00 mi15:09:223:53:139:4311:46
11:46
#21427
40K
24.85 mi15:20:284:04:199:5011:06
12:59
#21688
25.2M
25.20 mi15:25:364:09:279:545:08
14:53
#21799
Finish
26.22 mi15:36:364:20:279:5611:00
10:48
#21881
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi19174118441184419499(Top 73%)12090(Top 80%)12090(Top 537%)
10K6.21 mi3.10 mi18832+34211782+6211782+6218632(Top 70%)11762(Top 78%)11762(Top 522%)
15K9.32 mi3.11 mi19055-22311871-8911871-8919499(Top 73%)12090(Top 80%)12090(Top 537%)
20K12.43 mi3.11 mi19026+2911868+311868+319009(Top 71%)11900(Top 78%)11900(Top 528%)
Half13.11 mi0.68 mi19049-2311879-1111879-1119454(Top 73%)12095(Top 80%)12095(Top 537%)
25K15.53 mi2.42 mi19085-3611900-2111900-2119389(Top 73%)12008(Top 79%)12008(Top 533%)
30K18.64 mi3.11 mi19632-54712104-20412104-20421178(Top 80%)12711(Top 84%)12711(Top 564%)
20M20.00 mi1.36 mi19846-21412178-7412178-7421560(Top 81%)12805(Top 84%)12805(Top 569%)
21M21.00 mi1.00 mi20314-46812366-18812366-18824154(Top 91%)13954(Top 92%)13954(Top 620%)
35K21.75 mi0.75 mi20547-23312467-10112467-10124307(Top 91%)13991(Top 92%)13991(Top 621%)
23M23.00 mi1.25 mi21214-66712740-27312740-27325819(Top 97%)14741(Top 97%)14741(Top 655%)
24M24.00 mi1.00 mi21427-21312833-9312833-9324217(Top 91%)13911(Top 92%)13911(Top 618%)
40K24.85 mi0.85 mi21688-26112936-10312936-10324922(Top 94%)14263(Top 94%)14263(Top 633%)
25.2M25.20 mi0.35 mi21799-11112987-5112987-5125623(Top 96%)14613(Top 96%)14613(Top 649%)
Finish26.22 mi1.02 mi21881-8213012-2513012-2523588(Top 89%)13615(Top 90%)13615(Top 605%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 73%
×21story building
+97ft-345ft

Overall

19499

Males

12090

M45-49

12090

5K→10K

3.1 - 6.2 mi

Top 70%
×5story building
+79ft-138ft

Overall

18632

Males

11762

M45-49

11762

10K→15K

6.2 - 9.3 mi

Top 73%
×3story building
+67ft-78ft

Overall

19499

Males

12090

M45-49

12090

15K→20K

9.3 - 12.4 mi

Top 71%
×5story building
+106ft-86ft

Overall

19009

Males

11900

M45-49

11900

20K→Half

12.4 - 13.1 mi

Top 73%
×2story building
+19ft-37ft

Overall

19454

Males

12095

M45-49

12095

Half→25K

13.1 - 15.5 mi

Top 73%
×4story building
+66ft-88ft

Overall

19389

Males

12008

M45-49

12008

25K→30K

15.5 - 18.6 mi

Top 80%
×9story building
+181ft-148ft

Overall

21178

Males

12711

M45-49

12711

30K→20M

18.6 - 20.0 mi

Top 81%
×5story building
+64ft-50ft

Overall

21560

Males

12805

M45-49

12805

20M→21M

20.0 - 21.0 mi

Top 91%
×8story building
+106ft-24ft

Overall

24154

Males

13954

M45-49

13954

21M→35K

21.0 - 21.8 mi

Top 91%
×7story building
+17ft-86ft

Overall

24307

Males

13991

M45-49

13991

35K→23M

21.8 - 23.0 mi

Top 97%
×5story building
+23ft-63ft

Overall

25819

Males

14741

M45-49

14741

23M→24M

23.0 - 24.0 mi

Top 91%
×6story building
+12ft-82ft

Overall

24217

Males

13911

M45-49

13911

24M→40K

24.0 - 24.9 mi

Top 94%
×1story
+6ft-20ft

Overall

24922

Males

14263

M45-49

14263

40K→25.2M

24.9 - 25.2 mi

Top 96%
×1story
+13ft-16ft

Overall

25623

Males

14613

M45-49

14613

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2story building
+22ft-21ft

Overall

23588

Males

13615

M45-49

13615

Passing Analysis

Category:
Athletes Passed
1104
Passed By
3811
Net Change
-2707
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19174
5K → 10K563221+342#19174#18832
10K → 15K106329-223#18832#19055
15K → 20K173144+29#19055#19026
20K → Half1538-23#19026#19049
Half → 25K109145-36#19049#19085
25K → 30K50597-547#19085#19632
30K → 20M39253-214#19632#19846
20M → 21M5473-468#19846#20314
21M → 35K12245-233#20314#20547
35K → 23M4671-667#20547#21214
23M → 24M6219-213#21214#21427
24M → 40K6267-261#21427#21688
40K → 25.2M2113-111#21688#21799
25.2M → Finish1496-82#21799#21881
TOTALS11043811-2707
📊

Passing Visuals

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