Boston Marathon logo
BOSTON MARATHON 2023

Brian Smith

Bib: 13043•M

IN

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 37%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 40%
Division (M50-54)
#0 / 2052
Top 39%
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
7:19/mi
22:44
↑ 97↓ 3451.5%
10K· 6.21 mi
7:22/mi
45:37
↑ 79↓ 1380.4%
15K· 9.32 mi
7:26/mi
1:08:42
↑ 67↓ 78
20K· 12.43 mi
7:25/mi
1:31:45
↑ 106↓ 860.1%
Half· 13.11 mi
7:23/mi
1:36:47
↑ 19↓ 370.5%
25K· 15.53 mi
7:32/mi
1:55:03
↑ 66↓ 880.2%
30K· 18.64 mi
7:51/mi
2:19:27
↑ 181↓ 1480.2%
20M
8:18/mi
2:30:43
↑ 64↓ 500.2%
21M
8:18/mi
2:39:01
↑ 106↓ 241.6%
35K· 21.75 mi
7:53/mi
2:44:55
↑ 17↓ 861.7%
23M
8:15/mi
2:55:15
↑ 23↓ 630.6%
24M
8:08/mi
3:03:23
↓ 821.3%
40K· 24.85 mi
8:19/mi
3:10:30
↓ 200.3%
25.2M
9:02/mi
3:13:37
↑ 13↓ 160.2%
Finish· 26.22 mi
8:18/mi
3:22:04
↑ 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
Time1:36:47
Pace7:23 /mi
2nd Half
Distance13.11 mi
Time1:45:17
Pace8:02 /mi
📊Positive Split: 8.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:4122:447:1922:44
7:19
-
10K
6.21 mi11:14:3445:377:2022:53
7:22
+0:03
15K
9.32 mi11:37:391:08:427:2223:05
7:26
+0:04
20K
12.43 mi12:00:421:31:457:2323:03
7:25
-0:01
Half
13.11 mi12:05:441:36:477:235:02
7:23
-0:02
25K
15.53 mi12:24:001:55:037:2418:16
7:32
+0:09
30K
18.64 mi12:48:242:19:277:2924:24
7:51
+0:19
20M
20.00 mi12:59:402:30:437:3211:16
8:18
+0:27
21M
21.00 mi13:07:582:39:017:348:18
8:18
0:00
35K
21.75 mi13:13:522:44:557:355:54
7:53
-0:25
23M
23.00 mi13:24:122:55:157:3710:20
8:15
+0:22
24M
24.00 mi13:32:203:03:237:388:08
8:08
-0:07
40K
24.85 mi13:39:273:10:307:407:07
8:19
+0:11
25.2M
25.20 mi13:42:343:13:377:413:07
9:02
+0:43
Finish
26.22 mi13:51:013:22:047:438:27
8:18
-0:44

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

7:19 /mi

Average Pace

7:43 /mi

Slowest Pace

9:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:55:03

57% of race

Time at Steady Pace

30:18

15% of race

Time at Slower Pace

56:43

28% of race

Average Pace: 7:42 /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 mi10:51:4122:447:1922:44
7:19
#8211
10K
6.21 mi11:14:3445:377:2022:53
7:22
#8730
15K
9.32 mi11:37:391:08:427:2223:05
7:26
#8982
20K
12.43 mi12:00:421:31:457:2323:03
7:25
#8867
Half
13.11 mi12:05:441:36:477:235:02
7:23
#8876
25K
15.53 mi12:24:001:55:037:2418:16
7:32
#8876
30K
18.64 mi12:48:242:19:277:2924:24
7:51
#9014
20M
20.00 mi12:59:402:30:437:3211:16
8:18
#9246
21M
21.00 mi13:07:582:39:017:348:18
8:18
#9198
35K
21.75 mi13:13:522:44:557:355:54
7:53
#9264
23M
23.00 mi13:24:122:55:157:3710:20
8:15
#9366
24M
24.00 mi13:32:203:03:237:388:08
8:08
#9488
40K
24.85 mi13:39:273:10:307:407:07
8:19
#9542
25.2M
25.20 mi13:42:343:13:377:413:07
9:02
#9583
Finish
26.22 mi13:51:013:22:047:438:27
8:18
#9745
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi8211711571159593(Top 36%)7920(Top 52%)7920(Top 386%)
10K6.21 mi3.10 mi8730-5197419-3047419-3049351(Top 35%)7775(Top 51%)7775(Top 379%)
15K9.32 mi3.11 mi8982-2527552-1337552-1339593(Top 36%)7920(Top 52%)7920(Top 386%)
20K12.43 mi3.11 mi8867+1157474+787474+788666(Top 33%)7298(Top 48%)7298(Top 356%)
Half13.11 mi0.68 mi8876-97477-37477-39216(Top 35%)7651(Top 50%)7651(Top 373%)
25K15.53 mi2.42 mi88767468+97468+99027(Top 34%)7456(Top 49%)7456(Top 363%)
30K18.64 mi3.11 mi9014-1387511-437511-439761(Top 37%)7701(Top 51%)7701(Top 375%)
20M20.00 mi1.36 mi9246-2327620-1097620-10912350(Top 46%)8835(Top 58%)8835(Top 431%)
21M21.00 mi1.00 mi9198+487569+517569+519189(Top 35%)7162(Top 47%)7162(Top 349%)
35K21.75 mi0.75 mi9264-667597-287597-2811244(Top 42%)8226(Top 54%)8226(Top 401%)
23M23.00 mi1.25 mi9366-1027638-417638-4111521(Top 43%)8236(Top 54%)8236(Top 401%)
24M24.00 mi1.00 mi9488-1227686-487686-4812115(Top 46%)8441(Top 56%)8441(Top 411%)
40K24.85 mi0.85 mi9542-547687-17687-112169(Top 46%)8379(Top 55%)8379(Top 408%)
25.2M25.20 mi0.35 mi9583-417695-87695-812658(Top 48%)8571(Top 56%)8571(Top 418%)
Finish26.22 mi1.02 mi9745-1627750-557750-5514028(Top 53%)9247(Top 61%)9247(Top 451%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 36%
×21story building
+97ft-345ft

Overall

9593

Males

7920

M50-54

7920

5K→10K

3.1 - 6.2 mi

Top 35%
×5story building
+79ft-138ft

Overall

9351

Males

7775

M50-54

7775

10K→15K

6.2 - 9.3 mi

Top 36%
×3story building
+67ft-78ft

Overall

9593

Males

7920

M50-54

7920

15K→20K

9.3 - 12.4 mi

Top 33%
×5story building
+106ft-86ft

Overall

8666

Males

7298

M50-54

7298

20K→Half

12.4 - 13.1 mi

Top 35%
×2story building
+19ft-37ft

Overall

9216

Males

7651

M50-54

7651

Half→25K

13.1 - 15.5 mi

Top 34%
×4story building
+66ft-88ft

Overall

9027

Males

7456

M50-54

7456

25K→30K

15.5 - 18.6 mi

Top 37%
×9story building
+181ft-148ft

Overall

9761

Males

7701

M50-54

7701

30K→20M

18.6 - 20.0 mi

Top 46%
×5story building
+64ft-50ft

Overall

12350

Males

8835

M50-54

8835

20M→21M

20.0 - 21.0 mi

Top 35%
×8story building
+106ft-24ft

Overall

9189

Males

7162

M50-54

7162

21M→35K

21.0 - 21.8 mi

Top 42%
×7story building
+17ft-86ft

Overall

11244

Males

8226

M50-54

8226

35K→23M

21.8 - 23.0 mi

Top 43%
×5story building
+23ft-63ft

Overall

11521

Males

8236

M50-54

8236

23M→24M

23.0 - 24.0 mi

Top 46%
×6story building
+12ft-82ft

Overall

12115

Males

8441

M50-54

8441

24M→40K

24.0 - 24.9 mi

Top 46%
×1story
+6ft-20ft

Overall

12169

Males

8379

M50-54

8379

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

12658

Males

8571

M50-54

8571

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2story building
+22ft-21ft

Overall

14028

Males

9247

M50-54

9247

Passing Analysis

Category:
Athletes Passed
929*
Passed By
2463
Net Change
-1534
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8211
5K → 10K82601-519#8211#8730
10K → 15K71323-252#8730#8982
15K → 20K18772+115#8982#8867
20K → Half2130-9#8867#8876
Half → 25K98980#8876#8876
25K → 30K131269-138#8876#9014
30K → 20M33265-232#9014#9246
20M → 21M10456+48#9246#9198
21M → 35K2692-66#9198#9264
35K → 23M52154-102#9264#9366
23M → 24M36158-122#9366#9488
24M → 40K43*97-54#9488#9542
40K → 25.2M2263-41#9542#9583
25.2M → Finish23185-162#9583#9745
TOTALS929*2463-1534

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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