Boston Marathon logo
BOSTON MARATHON 2023

Lance Caswell

Bib: 19123•M

MO

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M60-64)
#0 / 1110
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:18/mi
25:47
↑ 97↓ 3451.5%
10K· 6.21 mi
8:07/mi
51:01
↑ 79↓ 1380.4%
15K· 9.32 mi
8:15/mi
1:16:38
↑ 67↓ 78
20K· 12.43 mi
9:02/mi
1:44:41
↑ 106↓ 860.1%
Half· 13.11 mi
8:20/mi
1:50:22
↑ 19↓ 370.5%
25K· 15.53 mi
8:46/mi
2:11:37
↑ 66↓ 880.2%
30K· 18.64 mi
9:07/mi
2:39:57
↑ 181↓ 1480.2%
20M
9:21/mi
2:52:40
↑ 64↓ 500.2%
21M
11:40/mi
3:04:20
↑ 106↓ 241.6%
35K· 21.75 mi
8:41/mi
3:10:50
↑ 17↓ 861.7%
23M
9:09/mi
3:22:18
↑ 23↓ 630.6%
24M
9:14/mi
3:31:32
↓ 821.3%
40K· 24.85 mi
9:16/mi
3:39:27
↓ 200.3%
25.2M
11:01/mi
3:43:15
↑ 13↓ 160.2%
Finish· 26.22 mi
9:03/mi
3:52:28
↑ 22↓ 21

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 HalfFaster
Distance13.11 mi
Time1:50:22
Pace8:25 /mi
2nd Half
Distance13.11 mi
Time2:02:06
Pace9:19 /mi
📊Positive Split: 10.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:2325:478:1825:47
8:18
-
10K
6.21 mi11:42:3751:018:1325:14
8:07
-0:11
15K
9.32 mi12:08:141:16:388:1325:37
8:15
+0:08
20K
12.43 mi12:36:171:44:418:2528:03
9:02
+0:47
Half
13.11 mi12:41:581:50:228:255:41
8:20
-0:42
25K
15.53 mi13:03:132:11:378:2821:15
8:46
+0:26
30K
18.64 mi13:31:332:39:578:3528:20
9:07
+0:21
20M
20.00 mi13:44:162:52:408:3812:43
9:21
+0:14
21M
21.00 mi13:55:563:04:208:4711:40
11:40
+2:19
35K
21.75 mi14:02:263:10:508:466:30
8:41
-2:59
23M
23.00 mi14:13:543:22:188:4811:28
9:09
+0:28
24M
24.00 mi14:23:083:31:328:499:14
9:14
+0:05
40K
24.85 mi14:31:033:39:278:507:55
9:16
+0:02
25.2M
25.20 mi14:34:513:43:158:523:48
11:01
+1:45
Finish
26.22 mi14:44:043:52:288:529:13
9:03
-1:58

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

8:07 /mi

Average Pace

8:52 /mi

Slowest Pace

11:40 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:22:19

35% of race

Time at Steady Pace

2:14:41

58% of race

Time at Slower Pace

15:28

7% of race

Average Pace: 8:52 /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 mi11:17:2325:478:1825:47
8:18
#16131
10K
6.21 mi11:42:3751:018:1325:14
8:07
#15890
15K
9.32 mi12:08:141:16:388:1325:37
8:15
#15977
20K
12.43 mi12:36:171:44:418:2528:03
9:02
#17089
Half
13.11 mi12:41:581:50:228:255:41
8:20
#17068
25K
15.53 mi13:03:132:11:378:2821:15
8:46
#17172
30K
18.64 mi13:31:332:39:578:3528:20
9:07
#17242
20M
20.00 mi13:44:162:52:408:3812:43
9:21
#17321
21M
21.00 mi13:55:563:04:208:4711:40
11:40
#17848
35K
21.75 mi14:02:263:10:508:466:30
8:41
#17779
23M
23.00 mi14:13:543:22:188:4811:28
9:09
#17743
24M
24.00 mi14:23:083:31:328:499:14
9:14
#17794
40K
24.85 mi14:31:033:39:278:507:55
9:16
#17785
25.2M
25.20 mi14:34:513:43:158:523:48
11:01
#17856
Finish
26.22 mi14:44:043:52:288:529:13
9:03
#17875
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi16131107491074916177(Top 61%)10762(Top 71%)10762(Top 970%)
10K6.21 mi3.10 mi15890+24110656+9310656+9315672(Top 59%)10592(Top 70%)10592(Top 954%)
15K9.32 mi3.11 mi15977-8710690-3410690-3416177(Top 61%)10762(Top 71%)10762(Top 970%)
20K12.43 mi3.11 mi17089-111211086-39611086-39619822(Top 74%)12229(Top 81%)12229(Top 1102%)
Half13.11 mi0.68 mi17068+2111077+911077+916646(Top 63%)10948(Top 72%)10948(Top 986%)
25K15.53 mi2.42 mi17172-10411106-2911106-2917741(Top 67%)11297(Top 74%)11297(Top 1018%)
30K18.64 mi3.11 mi17242-7011117-1111117-1117785(Top 67%)11250(Top 74%)11250(Top 1014%)
20M20.00 mi1.36 mi17321-7911131-1411131-1418256(Top 69%)11352(Top 75%)11352(Top 1023%)
21M21.00 mi1.00 mi17848-52711329-19811329-19822172(Top 83%)13053(Top 86%)13053(Top 1176%)
35K21.75 mi0.75 mi17779+6911289+4011289+4016337(Top 61%)10423(Top 69%)10423(Top 939%)
23M23.00 mi1.25 mi17743+3611253+3611253+3616838(Top 63%)10616(Top 70%)10616(Top 956%)
24M24.00 mi1.00 mi17794-5111271-1811271-1818167(Top 68%)11154(Top 73%)11154(Top 1005%)
40K24.85 mi0.85 mi17785+911256+1511256+1517328(Top 65%)10724(Top 71%)10724(Top 966%)
25.2M25.20 mi0.35 mi17856-7111288-3211288-3220474(Top 77%)12141(Top 80%)12141(Top 1094%)
Finish26.22 mi1.02 mi17875-1911282+611282+618166(Top 68%)11157(Top 74%)11157(Top 1005%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21story building
+97ft-345ft

Overall

16177

Males

10762

M60-64

10762

5K→10K

3.1 - 6.2 mi

Top 59%
×5story building
+79ft-138ft

Overall

15672

Males

10592

M60-64

10592

10K→15K

6.2 - 9.3 mi

Top 61%
×3story building
+67ft-78ft

Overall

16177

Males

10762

M60-64

10762

15K→20K

9.3 - 12.4 mi

Top 74%
×5story building
+106ft-86ft

Overall

19822

Males

12229

M60-64

12229

20K→Half

12.4 - 13.1 mi

Top 63%
×2story building
+19ft-37ft

Overall

16646

Males

10948

M60-64

10948

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

17741

Males

11297

M60-64

11297

25K→30K

15.5 - 18.6 mi

Top 67%
×9story building
+181ft-148ft

Overall

17785

Males

11250

M60-64

11250

30K→20M

18.6 - 20.0 mi

Top 69%
×5story building
+64ft-50ft

Overall

18256

Males

11352

M60-64

11352

20M→21M

20.0 - 21.0 mi

Top 83%
×8story building
+106ft-24ft

Overall

22172

Males

13053

M60-64

13053

21M→35K

21.0 - 21.8 mi

Top 61%
×7story building
+17ft-86ft

Overall

16337

Males

10423

M60-64

10423

35K→23M

21.8 - 23.0 mi

Top 63%
×5story building
+23ft-63ft

Overall

16838

Males

10616

M60-64

10616

23M→24M

23.0 - 24.0 mi

Top 68%
×6story building
+12ft-82ft

Overall

18167

Males

11154

M60-64

11154

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

17328

Males

10724

M60-64

10724

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

20474

Males

12141

M60-64

12141

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2story building
+22ft-21ft

Overall

18166

Males

11157

M60-64

11157

Passing Analysis

Category:
Athletes Passed
1307
Passed By
3051
Net Change
-1744
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16131
5K → 10K437196+241#16131#15890
10K → 15K159246-87#15890#15977
15K → 20K231135-1112#15977#17089
20K → Half3817+21#17089#17068
Half → 25K89193-104#17068#17172
25K → 30K144214-70#17172#17242
30K → 20M62141-79#17242#17321
20M → 21M9536-527#17321#17848
21M → 35K8617+69#17848#17779
35K → 23M9963+36#17779#17743
23M → 24M4899-51#17743#17794
24M → 40K6253+9#17794#17785
40K → 25.2M980-71#17785#17856
25.2M → Finish4261-19#17856#17875
TOTALS13073051-1744
📊

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing