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BOSTON MARATHON 2023

Robin Grantham

Bib: 471 M GB

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 2%
Gender (Male)
#0 / 15176
Top 3%
Masters (Masters Men)
#0 / 9891
Top 0.7%
Division (M50-54)
#0 / 2052
Top 0.2%
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
5:44/mi
17:49
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
5:50/mi
35:55
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
5:55/mi
54:18
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
6:05/mi
1:13:11
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
6:01/mi
1:17:17
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
6:06/mi
1:32:04
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
6:18/mi
1:51:38
↑ 181↓ 1480.2%
138 ft elev
20M
6:19/mi
2:00:13
↑ 64↓ 500.2%
148 ft elev
21M
6:36/mi
2:06:49
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
6:05/mi
2:11:22
↑ 17↓ 861.7%
156 ft elev
23M
6:16/mi
2:19:13
↑ 23↓ 630.6%
116 ft elev
24M
6:06/mi
2:25:19
↓ 821.3%
34 ft elev
40K· 24.85 mi
6:14/mi
2:30:39
↓ 200.3%
20 ft elev
25.2M
6:37/mi
2:32:56
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
5:54/mi
2:38:57
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:17:175:54 /mi⚡ faster
2nd Half
1:21:406:14 /mi+5.7%
Positive split — 5.7% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
17:495:443.11 mi17:49
5:44
-
10K
35:555:473.10 mi18:06
5:50
+0:06
15K
54:185:503.11 mi18:23
5:55
+0:05
20K
1:13:115:533.11 mi18:53
6:05
+0:10
Half(13.11 mi)
1:17:175:540.68 mi4:06
6:01
-0:04
25K
1:32:045:562.42 mi14:47
6:06
+0:05
30K
1:51:385:593.11 mi19:34
6:18
+0:12
20M
2:00:136:011.36 mi8:35
6:19
+0:01
21M
2:06:496:021.00 mi6:36
6:36
+0:17
35K
2:11:226:020.75 mi4:33
6:05
-0:31
23M
2:19:136:031.25 mi7:51
6:16
+0:11
24M
2:25:196:031.00 mi6:06
6:06
-0:10
40K
2:30:396:040.85 mi5:20
6:14
+0:08
25.2M
2:32:566:040.35 mi2:17
6:37
+0:23
Finish(26.22 mi)
2:38:576:041.02 mi6:01
5:54
-0:43
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

5:44 /mi

Average Pace

6:04 /mi

Slowest Pace

6:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

2:21:29

89% of race

Time at Steady Pace

17:28

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:04 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi295291291547505505
10K3.10 mi388-93353-62353-62463428428
15K3.11 mi414-26379-26379-26547505505
20K3.11 mi480-66441-62441-62724682682
Half(13.11 mi)0.68 mi487-7448-7448-7760719719
25K2.42 mi525-38485-37485-37729688688
30K3.11 mi553-28513-28513-28903860860
20M1.36 mi568-15528-15528-15893852852
21M1.00 mi575-7535-7535-7857811811
35K0.75 mi576-1536-1536-1857814814
23M1.25 mi579-3540-4540-4751710710
24M1.00 mi579539+1539+1756716716
40K0.85 mi579540-1540-1724685685
25.2M0.35 mi575+4536+4536+4679644644
Finish(26.22 mi)1.02 mi569+6531+5531+5529503503

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21story building
+97ft-345ft

Overall

547

Males

505

M50-54

505

5K→10K

3.1 - 6.2 mi

Top 2%
×5story building
+79ft-138ft

Overall

463

Males

428

M50-54

428

10K→15K

6.2 - 9.3 mi

Top 2%
×3story building
+67ft-78ft

Overall

547

Males

505

M50-54

505

15K→20K

9.3 - 12.4 mi

Top 3%
×5story building
+106ft-86ft

Overall

724

Males

682

M50-54

682

20K→Half

12.4 - 13.1 mi

Top 3%
×2story building
+19ft-37ft

Overall

760

Males

719

M50-54

719

Half→25K

13.1 - 15.5 mi

Top 3%
×4story building
+66ft-88ft

Overall

729

Males

688

M50-54

688

25K→30K

15.5 - 18.6 mi

Top 3%
×9story building
+181ft-148ft

Overall

903

Males

860

M50-54

860

30K→20M

18.6 - 20.0 mi

Top 3%
×5story building
+64ft-50ft

Overall

893

Males

852

M50-54

852

20M→21M

20.0 - 21.0 mi

Top 3%
×8story building
+106ft-24ft

Overall

857

Males

811

M50-54

811

21M→35K

21.0 - 21.8 mi

Top 3%
×7story building
+17ft-86ft

Overall

857

Males

814

M50-54

814

35K→23M

21.8 - 23.0 mi

Top 3%
×5story building
+23ft-63ft

Overall

751

Males

710

M50-54

710

23M→24M

23.0 - 24.0 mi

Top 3%
×6story building
+12ft-82ft

Overall

756

Males

716

M50-54

716

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

724

Males

685

M50-54

685

40K→25.2M

24.9 - 25.2 mi

Top 3%
×1story
+13ft-16ft

Overall

679

Males

644

M50-54

644

25.2M→Finish

25.2 - 26.2 mi

Top 2%
×2story building
+22ft-21ft

Overall

529

Males

503

M50-54

503

Passing Analysis

Category:
Passed
90
Passed By
364
Net Change
-274
SegmentPassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#295
5K → 10K295-93#295#388
10K → 15K632-26#388#414
15K → 20K268-66#414#480
20K → Half18-7#480#487
Half → 25K442-38#487#525
25K → 30K735-28#525#553
30K → 20M621-15#553#568
20M → 21M714-7#568#575
21M → 35K56-1#575#576
35K → 23M1013-3#576#579
23M → 24M12120#579#579
24M → 40K10100#579#579
40K → 25.2M62+4#579#575
25.2M → Finish126+6#575#569
TOTALS90364-274

Passing Charts

Category:
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Passing Circle

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Position Flow

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Race Lanes

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