Boston Marathon logo
BOSTON MARATHON 2023

Alfred Mcrobb

Bib: 18518•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 (M60-64)
#0 / 1110
Top 22%
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
8:02/mi
24:58
↑ 97↓ 3451.5%
10K· 6.21 mi
7:53/mi
49:26
↑ 79↓ 1380.4%
15K· 9.32 mi
8:09/mi
1:14:45
↑ 67↓ 78
20K· 12.43 mi
8:25/mi
1:40:54
↑ 106↓ 860.1%
Half· 13.11 mi
7:30/mi
1:46:01
↑ 19↓ 370.5%
25K· 15.53 mi
7:55/mi
2:05:13
↑ 66↓ 880.2%
30K· 18.64 mi
8:03/mi
2:30:13
↑ 181↓ 1480.2%
20M
8:15/mi
2:41:25
↑ 64↓ 500.2%
21M
8:46/mi
2:50:11
↑ 106↓ 241.6%
35K· 21.75 mi
8:09/mi
2:56:17
↑ 17↓ 861.7%
23M
8:19/mi
3:06:42
↑ 23↓ 630.6%
24M
8:16/mi
3:14:58
↓ 821.3%
40K· 24.85 mi
8:36/mi
3:22:19
↓ 200.3%
25.2M
9:44/mi
3:25:40
↑ 13↓ 160.2%
Finish· 26.22 mi
9:44/mi
3:35:35
↑ 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
Time1:46:01
Pace8:05 /mi
2nd Half
Distance13.11 mi
Time1:49:34
Pace8:21 /mi
📊Positive Split: 3.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:1924:588:0224:58
8:02
-
10K
6.21 mi11:44:4749:267:5724:28
7:53
-0:09
15K
9.32 mi12:10:061:14:458:0125:19
8:09
+0:16
20K
12.43 mi12:36:151:40:548:0726:09
8:25
+0:16
Half
13.11 mi12:41:221:46:018:055:07
7:30
-0:55
25K
15.53 mi13:00:342:05:138:0419:12
7:55
+0:25
30K
18.64 mi13:25:342:30:138:0425:00
8:03
+0:08
20M
20.00 mi13:36:462:41:258:0411:12
8:15
+0:12
21M
21.00 mi13:45:322:50:118:068:46
8:46
+0:31
35K
21.75 mi13:51:382:56:178:066:06
8:09
-0:37
23M
23.00 mi14:02:033:06:428:0710:25
8:19
+0:10
24M
24.00 mi14:10:193:14:588:078:16
8:16
-0:03
40K
24.85 mi14:17:403:22:198:087:21
8:36
+0:20
25.2M
25.20 mi14:21:013:25:408:103:21
9:44
+1:08
Finish
26.22 mi14:30:563:35:358:149:55
9:44
0:00

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

7:30 /mi

Average Pace

8:14 /mi

Slowest Pace

9:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

48:47

23% of race

Time at Steady Pace

2:17:25

64% of race

Time at Slower Pace

29:23

14% of race

Average Pace: 8:13 /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 mi11:20:1924:588:0224:58
8:02
#14265
10K
6.21 mi11:44:4749:267:5724:28
7:53
#14026
15K
9.32 mi12:10:061:14:458:0125:19
8:09
#14488
20K
12.43 mi12:36:151:40:548:0726:09
8:25
#15015
Half
13.11 mi12:41:221:46:018:055:07
7:30
#14784
25K
15.53 mi13:00:342:05:138:0419:12
7:55
#14343
30K
18.64 mi13:25:342:30:138:0425:00
8:03
#13754
20M
20.00 mi13:36:462:41:258:0411:12
8:15
#13599
21M
21.00 mi13:45:322:50:118:068:46
8:46
#13487
35K
21.75 mi13:51:382:56:178:066:06
8:09
#13453
23M
23.00 mi14:02:033:06:428:0710:25
8:19
#13333
24M
24.00 mi14:10:193:14:588:078:16
8:16
#13292
40K
24.85 mi14:17:403:22:198:087:21
8:36
#13298
25.2M
25.20 mi14:21:013:25:408:103:21
9:44
#13346
Finish
26.22 mi14:30:563:35:358:149:55
9:44
#13796
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi14265100611006115477(Top 58%)10491(Top 69%)10491(Top 945%)
10K6.21 mi3.10 mi14026+2399948+1139948+11313754(Top 52%)9846(Top 65%)9846(Top 887%)
15K9.32 mi3.11 mi14488-46210121-17310121-17315477(Top 58%)10491(Top 69%)10491(Top 945%)
20K12.43 mi3.11 mi15015-52710301-18010301-18016333(Top 61%)10762(Top 71%)10762(Top 970%)
Half13.11 mi0.68 mi14784+23110217+8410217+8410236(Top 38%)8248(Top 54%)8248(Top 743%)
25K15.53 mi2.42 mi14343+44110015+20210015+20212047(Top 45%)8932(Top 59%)8932(Top 805%)
30K18.64 mi3.11 mi13754+5899742+2739742+27311265(Top 42%)8483(Top 56%)8483(Top 764%)
20M20.00 mi1.36 mi13599+1559663+799663+7911956(Top 45%)8696(Top 57%)8696(Top 783%)
21M21.00 mi1.00 mi13487+1129603+609603+6012055(Top 45%)8613(Top 57%)8613(Top 776%)
35K21.75 mi0.75 mi13453+349576+279576+2713127(Top 49%)9042(Top 60%)9042(Top 815%)
23M23.00 mi1.25 mi13333+1209502+749502+7412025(Top 45%)8485(Top 56%)8485(Top 764%)
24M24.00 mi1.00 mi13292+419466+369466+3613035(Top 49%)8870(Top 58%)8870(Top 799%)
40K24.85 mi0.85 mi13298-69441+259441+2513904(Top 52%)9194(Top 61%)9194(Top 828%)
25.2M25.20 mi0.35 mi13346-489447-69447-616293(Top 61%)10216(Top 67%)10216(Top 920%)
Finish26.22 mi1.02 mi13796-4509610-1639610-16320877(Top 78%)12357(Top 81%)12357(Top 1113%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 58%
×21story building
+97ft-345ft

Overall

15477

Males

10491

M60-64

10491

5K→10K

3.1 - 6.2 mi

Top 52%
×5story building
+79ft-138ft

Overall

13754

Males

9846

M60-64

9846

10K→15K

6.2 - 9.3 mi

Top 58%
×3story building
+67ft-78ft

Overall

15477

Males

10491

M60-64

10491

15K→20K

9.3 - 12.4 mi

Top 61%
×5story building
+106ft-86ft

Overall

16333

Males

10762

M60-64

10762

20K→Half

12.4 - 13.1 mi

Top 38%
×2story building
+19ft-37ft

Overall

10236

Males

8248

M60-64

8248

Half→25K

13.1 - 15.5 mi

Top 45%
×4story building
+66ft-88ft

Overall

12047

Males

8932

M60-64

8932

25K→30K

15.5 - 18.6 mi

Top 42%
×9story building
+181ft-148ft

Overall

11265

Males

8483

M60-64

8483

30K→20M

18.6 - 20.0 mi

Top 45%
×5story building
+64ft-50ft

Overall

11956

Males

8696

M60-64

8696

20M→21M

20.0 - 21.0 mi

Top 45%
×8story building
+106ft-24ft

Overall

12055

Males

8613

M60-64

8613

21M→35K

21.0 - 21.8 mi

Top 49%
×7story building
+17ft-86ft

Overall

13127

Males

9042

M60-64

9042

35K→23M

21.8 - 23.0 mi

Top 45%
×5story building
+23ft-63ft

Overall

12025

Males

8485

M60-64

8485

23M→24M

23.0 - 24.0 mi

Top 49%
×6story building
+12ft-82ft

Overall

13035

Males

8870

M60-64

8870

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

13904

Males

9194

M60-64

9194

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

16293

Males

10216

M60-64

10216

25.2M→Finish

25.2 - 26.2 mi

Top 78%
×2story building
+22ft-21ft

Overall

20877

Males

12357

M60-64

12357

Passing Analysis

Category:
Athletes Passed
2581
Passed By
2112
Net Change
+469
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14265
5K → 10K430191+239#14265#14026
10K → 15K71533-462#14026#14488
15K → 20K69596-527#14488#15015
20K → Half2310+231#15015#14784
Half → 25K4509+441#14784#14343
25K → 30K5967+589#14343#13754
30K → 20M18126+155#13754#13599
20M → 21M14937+112#13599#13487
21M → 35K7036+34#13487#13453
35K → 23M15636+120#13453#13333
23M → 24M8645+41#13333#13292
24M → 40K5864-6#13292#13298
40K → 25.2M2472-48#13298#13346
25.2M → Finish10460-450#13346#13796
TOTALS25812112+469
📊

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