Boston Marathon logo
BOSTON MARATHON 2023

Brandon Griffin

Bib: 5091•M

CA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 7%
Gender (Male)
#0 / 15176
Top 12%
Division (M18-39)
#0 / 5285
Top 28%
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
6:37/mi
20:34
↑ 97↓ 3451.5%
10K· 6.21 mi
6:21/mi
40:19
↑ 79↓ 1380.4%
15K· 9.32 mi
6:22/mi
1:00:06
↑ 67↓ 78
20K· 12.43 mi
6:27/mi
1:20:07
↑ 106↓ 860.1%
Half· 13.11 mi
6:24/mi
1:24:29
↑ 19↓ 370.5%
25K· 15.53 mi
6:29/mi
1:40:12
↑ 66↓ 880.2%
30K· 18.64 mi
6:43/mi
2:01:03
↑ 181↓ 1480.2%
20M
6:40/mi
2:10:06
↑ 64↓ 500.2%
21M
6:59/mi
2:17:05
↑ 106↓ 241.6%
35K· 21.75 mi
6:13/mi
2:21:44
↑ 17↓ 861.7%
23M
6:34/mi
2:29:57
↑ 23↓ 630.6%
24M
6:24/mi
2:36:21
↓ 821.3%
40K· 24.85 mi
6:41/mi
2:42:04
↓ 200.3%
25.2M
7:18/mi
2:44:35
↑ 13↓ 160.2%
Finish· 26.22 mi
6:26/mi
2:51:08
↑ 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
Time1:24:29
Pace6:27 /mi
2nd Half
Distance13.11 mi
Time1:26:39
Pace6:37 /mi
📊Positive Split: 2.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:3720:346:3720:34
6:37
-
10K
6.21 mi10:43:2240:196:2919:45
6:21
-0:16
15K
9.32 mi11:03:091:00:066:2719:47
6:22
+0:01
20K
12.43 mi11:23:101:20:076:2720:01
6:27
+0:05
Half
13.11 mi11:27:321:24:296:274:22
6:24
-0:03
25K
15.53 mi11:43:151:40:126:2715:43
6:29
+0:05
30K
18.64 mi12:04:062:01:036:3020:51
6:43
+0:14
20M
20.00 mi12:13:092:10:066:309:03
6:40
-0:03
21M
21.00 mi12:20:082:17:056:326:59
6:59
+0:19
35K
21.75 mi12:24:472:21:446:314:39
6:13
-0:46
23M
23.00 mi12:33:002:29:576:318:13
6:34
+0:21
24M
24.00 mi12:39:242:36:216:316:24
6:24
-0:10
40K
24.85 mi12:45:072:42:046:315:43
6:41
+0:17
25.2M
25.20 mi12:47:382:44:356:322:31
7:18
+0:37
Finish
26.22 mi12:54:112:51:086:326:33
6:26
-0:52

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

6:13 /mi

Average Pace

6:32 /mi

Slowest Pace

7:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:41:38

94% of race

Time at Steady Pace

9:30

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:32 /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 mi10:23:3720:346:3720:34
6:37
#3003
10K
6.21 mi10:43:2240:196:2919:45
6:21
#2431
15K
9.32 mi11:03:091:00:066:2719:47
6:22
#2246
20K
12.43 mi11:23:101:20:076:2720:01
6:27
#2184
Half
13.11 mi11:27:321:24:296:274:22
6:24
#2183
25K
15.53 mi11:43:151:40:126:2715:43
6:29
#2139
30K
18.64 mi12:04:062:01:036:3020:51
6:43
#2196
20M
20.00 mi12:13:092:10:066:309:03
6:40
#2170
21M
21.00 mi12:20:082:17:056:326:59
6:59
#2146
35K
21.75 mi12:24:472:21:446:314:39
6:13
#2093
23M
23.00 mi12:33:002:29:576:318:13
6:34
#2029
24M
24.00 mi12:39:242:36:216:316:24
6:24
#1996
40K
24.85 mi12:45:072:42:046:315:43
6:41
#1986
25.2M
25.20 mi12:47:382:44:356:322:31
7:18
#1986
Finish
26.22 mi12:54:112:51:086:326:33
6:26
#1956
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3003284528451947(Top 7%)1865(Top 12%)1865(Top 35%)
10K6.21 mi3.10 mi2431+5722322+5232322+5232018(Top 8%)1929(Top 13%)1929(Top 36%)
15K9.32 mi3.11 mi2246+1852152+1702152+1701947(Top 7%)1865(Top 12%)1865(Top 35%)
20K12.43 mi3.11 mi2184+622092+602092+602001(Top 8%)1920(Top 13%)1920(Top 36%)
Half13.11 mi0.68 mi2183+12091+12091+12206(Top 8%)2116(Top 14%)2116(Top 40%)
25K15.53 mi2.42 mi2139+442052+392052+392081(Top 8%)1995(Top 13%)1995(Top 38%)
30K18.64 mi3.11 mi2196-572106-542106-542439(Top 9%)2321(Top 15%)2321(Top 44%)
20M20.00 mi1.36 mi2170+262080+262080+262104(Top 8%)2005(Top 13%)2005(Top 38%)
21M21.00 mi1.00 mi2146+242056+242056+242065(Top 8%)1951(Top 13%)1951(Top 37%)
35K21.75 mi0.75 mi2093+532006+502006+501310(Top 5%)1247(Top 8%)1247(Top 24%)
23M23.00 mi1.25 mi2029+641945+611945+611656(Top 6%)1574(Top 10%)1574(Top 30%)
24M24.00 mi1.00 mi1996+331912+331912+331676(Top 6%)1584(Top 10%)1584(Top 30%)
40K24.85 mi0.85 mi1986+101902+101902+102264(Top 9%)2102(Top 14%)2102(Top 40%)
25.2M25.20 mi0.35 mi1986190219022868(Top 11%)2623(Top 17%)2623(Top 50%)
Finish26.22 mi1.02 mi1956+301872+301872+302123(Top 8%)1968(Top 13%)1968(Top 37%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 7%
×21story building
+97ft-345ft

Overall

1947

Males

1865

M18-39

1865

5K→10K

3.1 - 6.2 mi

Top 8%
×5story building
+79ft-138ft

Overall

2018

Males

1929

M18-39

1929

10K→15K

6.2 - 9.3 mi

Top 7%
×3story building
+67ft-78ft

Overall

1947

Males

1865

M18-39

1865

15K→20K

9.3 - 12.4 mi

Top 8%
×5story building
+106ft-86ft

Overall

2001

Males

1920

M18-39

1920

20K→Half

12.4 - 13.1 mi

Top 8%
×2story building
+19ft-37ft

Overall

2206

Males

2116

M18-39

2116

Half→25K

13.1 - 15.5 mi

Top 8%
×4story building
+66ft-88ft

Overall

2081

Males

1995

M18-39

1995

25K→30K

15.5 - 18.6 mi

Top 9%
×9story building
+181ft-148ft

Overall

2439

Males

2321

M18-39

2321

30K→20M

18.6 - 20.0 mi

Top 8%
×5story building
+64ft-50ft

Overall

2104

Males

2005

M18-39

2005

20M→21M

20.0 - 21.0 mi

Top 8%
×8story building
+106ft-24ft

Overall

2065

Males

1951

M18-39

1951

21M→35K

21.0 - 21.8 mi

Top 5%
×7story building
+17ft-86ft

Overall

1310

Males

1247

M18-39

1247

35K→23M

21.8 - 23.0 mi

Top 6%
×5story building
+23ft-63ft

Overall

1656

Males

1574

M18-39

1574

23M→24M

23.0 - 24.0 mi

Top 6%
×6story building
+12ft-82ft

Overall

1676

Males

1584

M18-39

1584

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2264

Males

2102

M18-39

2102

40K→25.2M

24.9 - 25.2 mi

Top 11%
×1story
+13ft-16ft

Overall

2868

Males

2623

M18-39

2623

25.2M→Finish

25.2 - 26.2 mi

Top 8%
×2story building
+22ft-21ft

Overall

2123

Males

1968

M18-39

1968

Passing Analysis

Category:
Athletes Passed
1353
Passed By
306
Net Change
+1047
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3003
5K → 10K58412+572#3003#2431
10K → 15K19813+185#2431#2246
15K → 20K9028+62#2246#2184
20K → Half1110+1#2184#2183
Half → 25K6925+44#2183#2139
25K → 30K46103-57#2139#2196
30K → 20M4519+26#2196#2170
20M → 21M4925+24#2170#2146
21M → 35K552+53#2146#2093
35K → 23M7612+64#2093#2029
23M → 24M4411+33#2029#1996
24M → 40K2919+10#1996#1986
40K → 25.2M13130#1986#1986
25.2M → Finish4414+30#1986#1956
TOTALS1353306+1047
📊

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